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In A Companion to David Lewis, Barry Loewer and Jonathan Schaffer bring together top philosophers to explain, discuss, and critically extend Lewis's seminal work in original ways. Students and scholars will discover the underlying themes and complex interconnections woven through the diverse range of his work in metaphysics, philosophy of language, logic, epistemology, philosophy of science, philosophy of mind, ethics, and aesthetics.

  • The first and only comprehensive study of the work of David Lewis, one of the most systematic and influential philosophers of the latter half of the 20th century
  • Contributions shed light on the underlying themes and complex interconnections woven through Lewis's work across his enormous range of influence, including metaphysics, language, logic, epistemology, science, mind, ethics, and aesthetics
  • Outstanding Lewis scholars and leading philosophers working in the fields Lewis influenced explain, discuss, and critically extend Lewis's work in original ways
  • An essential resource for students and researchers across analytic philosophy that covers the major themes of Lewis's work

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Table of Contents

Blackwell Companions to Philosophy

Title page

Copyright page

Notes on Contributors

Part I: Biography and New Work

1: Intellectual Biography of David Lewis (1941–2001): Early Influences

1.1  Childhood

1.2  Swarthmore: The First Two Years

1.3  Oxford

1.4  Swarthmore: Second Two Years

1.5  The Hudson Institute

1.6  Graduate School: Australia I, Jack Smart

1.7  UCLA

1.8  Australia II: David Armstrong

1.9  Australia III: The First Visit

1.10  Princeton

1.11  Australia IV: 1976

Acknowledgments

Notes

References

2: Counterparts of States of Affairs

Acknowledgments

Note

References

3: Reply to Dana Scott, “Is There Life on Possible Worlds?”

Note

Part II: Methodology and Context

4: Lewis's Philosophical Method

4.1  Starting Points: Science and Common Sense

4.2  After the Starting Points: Defining Theoretical Roles, Finding Deservers

4.3  Counting the Costs

4.4  Conclusion

Notes

References

5: On Metaphysical Analysis

5.1  Introduction

5.2  Some Background on Holes

5.3  The Nature of Space

5.4  Space, Worlds, and Holes

5.5  Metaphysics and Analysis

5.6  Conclusion

Notes

References

6: A Lewisian History of Philosophy

6.1  Properties

6.2  Carving at the Joints

6.3  Persistence

6.4  Causality

6.5  Modality

6.6  Conclusion

Acknowledgments

Notes

References

7: David Lewis's Place in Analytic Philosophy

Acknowledgments

Notes

References

Part III: Metaphysics and Science

8: Humean Supervenience

8.1  What Is Humean Supervenience?

8.2  Supervenience

8.3  What Is Perfect Naturalness?

8.4  Humean Supervenience and Other Humean Theses

8.5  Why Care about Humean Supervenience

8.6  Points, Vectors, and Lewis

References

9: No Work for a Theory of Universals

9.1  Introduction

9.2  Best System Accounts of Laws

9.3  Assessing the Options

9.4  Extending the Account

9.5  Another Approach

9.6  Conclusion

Acknowledgments

Notes

References

10: Hume's Dictum and Metaphysical Modality: Lewis's Combinatorialism

Introduction

10.1  HD and Its Recurrent Role in Lewis's Work

10.2  HD and Lewis's Combinatorialism

10.3  Undergeneration Concerns for Lewis's Combinatorialism

10.4  The End Game

Acknowledgments

Notes

References

11: Truthmaking: With and Without Counterpart Theory

11.1  The Theory of Truthmaking

11.2  Truthmaking and States of Affairs

11.3  Truthmaking and Theories of Truth

11.4  Lewis's Critique of (TM) and a States-of-Affairs Ontology

11.5  (TM) and a States-of-Affairs Ontology, Reconsidered

11.6  Truth Supervenes on Being

Notes

References

12: How to Be Humean

The Doctrine and the Program

12.1  Humean Supervenience and the Failure of Content-Preserving Reduction

12.2  A Different Conception of Humean Reduction: Identifying Truthmakers

12.3  Digging Deeper

12.4  Conclusion

Notes

References

13: Where (in Logical Space) Is God?

13.1  Background and Scene-Setting

13.2  The God of the Philosophers

13.3  Free Will

13.4  Divine Evil

13.5  Atonement as Penal Substitution

13.6  The Many-Worlds Theodicy

Notes

14:

De Re

Modality, Essentialism, and Lewis's Humeanism

14.1  Introduction

14.2  

De Re

Modality and Counterpart Theory

14.3  Counterpart Theory and the Inconstancy of

De Re

Modal Predication

14.4  Truthmaking and Counterpart Theory

14.5  Lewis versus School Metaphysics

14.6  Humean Supervenience and

De Re

Modality

Notes

References

15: David Lewis on Persistence

15.1  Persistence and Humean Supervenience

15.2  In Defense of Stages

15.3  Temporary Intrinsics

15.4  Stages, or Sums of Stages?

Acknowledgments

References

16: “Perfectly Understood, Unproblematic, and Certain”: Lewis on Mereology

16.1  Four Theses about Composition

16.2  First Thesis: Uniqueness

16.3  Second Thesis: Unrestricted Composition

16.4  First Reflection: Motivating Mereological Principles

16.5  Second Reflection: Persistence

16.6  Third Thesis: Ontological Innocence

16.7  Fourth Thesis: Unmysteriousness

16.8  Fourth Reflection: Privileging Mereology

References

17: Humean Reductionism about Laws of Nature

17.1  Introduction

17.2  Preliminaries

17.3  The Elements of Humean Reductionism

17.4  The Best System Account: An Overview

17.5  A Menu of Challenges to the BSA

17.6  A Solution and a Problem

17.7  Conclusion

Acknowledgments

Notes

References

Further Reading

18: Why Lewisians Should Love Deterministic Chance

18.1  Chance and Determinism

18.2  Lewis's Theory of Chance

18.3  A Theory of Deterministic Chance

Notes

References

19: Lewis on Causation

19.1  Introduction

19.2  Preliminaries

19.3  Lewis's Analyses

19.4  Applications

19.5  Conclusion

Acknowledgments

Notes

References

Part IV: Language and Logic

20: David Lewis on Convention

20.1  Coordination in the Social World

20.2  Convention

20.3  Conventions of Meaning in Critical Perspective

20.4  Conclusion

References

21: Asking What a Meaning

Does

: David Lewis's Contributions to Semantics

21.1  David Lewis's Background and Early Involvement with Linguistics

21.2  Lewis's Central Methodological Advice for the Study of Meaning

21.3  Languages and Language

21.4  Possible Worlds, Counterfactuals, Modality, Counterparts

21.5  Important Particular Ideas

21.6  Bridging Philosophy and Linguistics

Acknowledgments

Notes

References

22: Accommodation in a Language Game

22.1  Introduction

22.2  Presupposition Recognition

22.3  The Character of Accommodation

22.4  The Role of the Scoreboard in Accommodation

22.5  Limits on Accommodation

22.6  Conclusion

Acknowledgments

Notes

References

23: Lewis on Reference and Eligibility

23.1  Lewis's Interpretationism

23.2  Credible Reference Magnetism

23.3  Buck-passing

23.4  Conclusion

Notes

References

24: On the Nature of Certain Philosophical Entities: Set Theoretic Constructionalism in the Metaphysics of David Lewis

24.1  Lewis's Ontological Scheme

24.2  Metaphysics of Classes: The Simple View

24.3  Metaphysics of Classes: The Structuralist View

24.4  Implications of the Simple View

24.5  Implications of the Structuralist View

24.6  The Case against Magical Ersatzism Revisited

24.7  Conclusion

Notes

References

25: Primitive Self-Ascription: Lewis on the

De Se

25.1  Lewis's Method

25.2  Lewis's Account of the

De Se

25.3  Centered Worlds

25.4  Attitudes

De Re

25.5  Some Costs of Primitive Self-Ascription

25.6  Conclusion

Acknowledgments

Notes

References

26: Counterfactuals and Humean Reduction

26.1  Introduction

26.2  Goodman's Project

26.3  Lewis's Project

26.4  Humean Supervenience

26.5  Natural Properties

26.6  Conclusion

Notes

References

27: On the Plurality of Lewis's Triviality Results

27.1  Introduction

27.2  Probabilities of Conditionals as Conditional Probabilities

27.3  Desire as Belief

27.4  Some Future Avenues of Research?

Acknowledgments

Notes

References

28: Decision Theory after Lewis

28.1  Two Versions of Decision Theory

28.2  Imaging and Dependency Hypotheses

28.3  Desire as Belief

28.4  A Puzzling Feature of Lewis's Views

References

29: Lewis on Mereology and Set Theory

29.1  Parts of Classes

29.2  Objections to Singletons

29.3  Protestations of Innocence

29.4  Background on Mereoplethynticology

29.5  Axioms of Choice

29.6  Multitudes of Individuals

References

Part V: Epistemology and Mind

30: Lewis on Knowledge Ascriptions

30.1  Lewisian Knowledge Ascription

30.2  Epistemic Questions

30.3  Semantic Questions

Acknowledgments

Notes

References

31: Humility and Coexistence in Kant and Lewis: Two Modal Themes, with Variations

Introduction

31.1  Contingency and Humility

31.2  Necessity and Coexistence

31.3  Conclusion

Notes

References

32: Analytic Functionalism

32.1  Overview

32.2  The Canberra Plan

32.3  Contingent Identity

32.4  Beliefs, Desires, Decisions

32.5  Phenomenal Character

Acknowledgments

References

33: Lewis on Materialism and Experience

33.1  Introduction

33.2  Element #1: Materialism

33.3  Element #2: Experience

33.4  Element #3: Materialism and Experience in Tension

33.5  Element #4: Distinct Conceptions of Experience

33.6  Know-How and the Ability Hypothesis

33.7  Contextualism and the Identification Thesis

Concluding Remarks

Acknowledgments

Notes

References

Part VI: Ethics and Politics

34: Lewis on Value and Valuing

34.1  Introduction

34.2  From Valuing to Value

34.3  Pluralism about Value

34.4  Some Questions

Notes

References

35: David Lewis's Social and Political Philosophy

35.1  Introduction

35.2  Toleration

35.3  Deterrence

35.4  Punishment

35.5  Obligations to the Distant Poor

35.6  A Lewisian View in Social and Political Philosophy?

Acknowledgments

Notes

References

Bibliography of the Work of David Lewis

1966

1968

1969

1970

1971

1972

1973

1974

1975

1976

1977

1978

1979

1980

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2001

2002

2003

2004

2007

2009

2015

Index

End User License Agreement

List of Tables

Table 9.1    The different positions that authors have taken in recent literature

Diagram 20.1

Diagram 20.2

List of Illustrations

Figure 1.1    Going home from the MCG after a loss to Collingwood, 1984. © Stephanie Lewis 2013.

Figure 1.2    Photo by Ewart Lewis, November 1950.

Figure 1.3    David Lewis at age 14. Photo by Ewart Lewis.

Figure 1.4    David Lewis and Jack Smart. Belcunda, South Australia, August 1971. © Stephanie Lewis.

Figure 1.5    The Two Davids, Glenogil Station, Victoria. August 1976. © Stephanie Lewis.

Figure 1.6    North Queensland, 1990. © Stephanie Lewis.

Figure 18.1    A diagram of a coin toss setup, from Diaconis (1998, 803). The

x

axis represents the coin's initial upward velocity v, while the y axis represents the angular velocity ω of its spinning. Assuming the coin begins with the heads side up, the black points represent initial conditions that lead to a heads outcome, while the white points represent initial conditions that lead to a tails outcome. Reprinted by kind permission of

Quarterly of Applied Mathematics

.

Figure 19.1    The place of causation in Lewis's program of Humean supervenience. Concepts that are not part of metaphysics proper are marked with an asterisk. Created by Christopher Hitchcock.

Figure 19.2    Interrelationships among concepts introduced in Lewis's analyses of causation, rational decision, and disposition. The arrow marked with a question mark corresponds to my own proposal. Created by Christopher Hitchcock.

Figure 26.1

Figure 27.1    Moving probability.

Guide

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Notes on Contributors

Helen Beebee is Samuel Hall Professor of Philosophy at the University of Manchester. Her research focuses on issues surrounding Humeanism and its rivals. She is the author of Hume on Causation (Routledge 2006) and Free Will: An Introduction (Palgrave 2013).

Karen Bennett is Associate Professor of Philosophy at Cornell University. She is the co-editor of Oxford Studies in Metaphysics, and the author of many articles in metaphysics and philosophy of mind. Her book Making Things Up is forthcoming with Oxford University Press.

David Braddon-Mitchell is Professor of Philosophy at the University of Sydney; he works in the philosophy of mind, metaphysics, and metaethics, and has published in these areas in various journals including Mind, The Journal of Philosophy, Noûs, Philosophical Studies, Erkenntnis, and Synthese.

Phillip Bricker is Professor of Philosophy at the University of Massachusetts-Amherst. He wrote his doctoral dissertation at Princeton University under the direction of David Lewis. He works primarily in metaphysics, especially issues in modality and ontology.

Rachael Briggs splits her time as a research fellow between the Australian National University and Griffith University. Her research interests include formal epistemology, metaphysics (particularly the metaphysics of chance), and preference-satisfaction theories of wellbeing.

John P. Burgess is the John N. Woodhull Professor of Philosophy at Princeton University, where he has taught since 1975. He is author or co-author of eight books and scores of papers and reviews in logic and related areas of philosophy.

John Collins completed a PhD at Princeton under David Lewis's supervision. He is Associate Professor of Philosophy at Columbia University. His current research centers on the nature of simple belief, the role of modal principles in epistemology, the foundations of causal decision theory, and the metaphysics of dispositions.

M. Eddon is an Assistant Professor of Philosophy at the University of Massachusetts-Amherst. Her primary area of research is metaphysics, with interests in fundamentality, quantity, mereology, and intrinsicality.

Alan Hájek is Professor of Philosophy at the Australian National University (since 2005). He works mainly in formal epistemology, the philosophical foundations of probability, decision theory, philosophy of science, metaphilosophy, philosophical logic, and philosophy of religion. He received his PhD at Princeton University, and worked for 12 years at Caltech.

Ned Hall teaches philosophy at Harvard University, and works primarily on topics in metaphysics and epistemology that overlap with philosophy of science (causation, laws of nature, objective chance and its relation to credence – all the fun stuff, in other words).

Katherine Hawley is Professor of Philosophy at the University of St Andrews, Scotland. She is the author of How Things Persist (Oxford University Press 2001) and of Trust: A Very Short Introduction (Oxford University Press 2012), as well as numerous papers within metaphysics and beyond.

Christopher Hitchcock is Professor of Philosophy at the California Institute of Technology. He has published extensively on the topic of causation, including articles in most of the leading philosophy journals, as well as venues in computer science, law, and psychology. He is also the co-editor of the Oxford Handbook of Causation.

Richard Holton is Professor of Philosophy at the University of Cambridge and a fellow of Peterhouse. He works in many different fields, and is the author of Willing, Wanting, Waiting.

Jenann Ismael is a Professor of Philosophy at the University of Arizona. She has published two books and numerous articles. Her research focuses on issues related to philosophy of physics including the nature of space and time, what quantum phenomena are telling us about the world, how fundamental ontology relates to higher level structures, and how we ourselves fit into the natural order.

Simon Keller is Professor of Philosophy at Victoria University of Wellington. He has published widely on topics in ethics and political philosophy. He is the author of The Limits of Loyalty and Partiality.

Rae Langton is Professor of Philosophy at the University of Cambridge. She works in ethics, metaphysics, feminist philosophy, and a range of other areas. She is author of Kantian Humility: Our Ignorance of Things in Themselves (Oxford University Press 1998) and Sexual Solipsism: Philosophical Essays on Pornography and Objectification (Oxford University Press 2009).

Ernie Lepore is Professor of Philosophy and Cognitive Science at Rutgers University. He has published in philosophy of language and philosophy of mind.

Stephanie R. Lewis taught philosophy from 1971 until 1984. When she realized that a tenured job was a complete impossibility, she went to Wharton and got an MBA. She has worked in public finance since then; nonetheless she is a philosopher first and last.

Fraser MacBride is Professor of Logic & Rhetoric at Glasgow University. He works on metaphysics and the philosophy of mathematics and is writing a book on the history of analytic philosophy. His recent publications include “How Involved Do You Want to Be in a Non-Symmetric Relationship?,” Australasian Journal of Philosophy.

C.J.G. Meacham is an Associate Professor of Philosophy at the University of Massachusetts-Amherst. His main interests are in formal epistemology, decision theory, and the philosophy of physics.

Kristie Miller is an Associate Professor of Philosophy in the Department of Philosophy at the University of Sydney, Australia. She works primarily in metaphysics, in particular on the nature of time and persistence. Her most recent work focuses on the intersection of agency and timelessness.

Daniel Nolan is Professor of Philosophy at the Australian National University. He is the author of Topics in the Philosophy of Possible Worlds (Routledge) and David Lewis (Acumen/McGill-Queens), and articles in journals including Noûs, Philosophy and Phenomenological Research, Philosophical Studies, and Analysis. He works primarily in metaphysics.

Barbara H. Partee is Distinguished University Professor Emerita of Linguistics and Philosophy at the University of Massachusetts-Amherst. Her research centers on formal semantics; she is writing a book on the history of formal semantics. She also teaches semantics in Moscow and has worked with Russian colleagues on Slavic semantics.

Robert Pasnau is Professor of Philosophy at the University of Colorado. He works in the areas of metaphysics and knowledge, and especially the history of these subjects. He is the editor of Oxford Studies in Medieval Philosophy.

Peter Railton is Perrin Professor of Philosophy at the University of Michigan. David Lewis was his thesis supervisor. Railton's primary research has been in the philosophy of science, moral philosophy, and aesthetics. Facts, Values, and Norms (Cambridge University Press 2003) collects some of his papers in ethics and metaethics.

Craige Roberts is Professor of Linguistics and Adjunct Professor of Philosophy at the Ohio State University. Her work in formal semantics and pragmatics focuses on the nature of the context of utterance and the pragmatics of questions, presupposition, modals and attitude predicates, anaphora and reference, and their interactions in discourse.

Gideon Rosen is Stuart Professor of Philosophy and chair of the Council of the Humanities at Princeton University. He is the author (with John P. Burgess) of A Subject with No Object (Oxford 1997) and co-editor of the forthcoming Norton Introduction to Philosophy.

Jonathan Schaffer is Professor of Philosophy at Rutgers University. His research centers on metaphysics, epistemology, and language, and his publications include “Monism: The Priority of the Whole,” “On What Grounds What,” and “Knowing the Answer.”

Wolfgang Schwarz is a postdoctoral research fellow at the Australian National University in Canberra. He works on topics in epistemology, metaphysics, philosophy of language, and logic.

Scott Soames is Distinguished Professor and Director of the School of Philosophy at USC. His recent books (from Princeton University Press) include What Is Meaning?, Philosophy of Language, The Analytic Tradition in Philosophy Vol. 1, and Analytic Philosophy in America and Other Essays. Rethinking Language, Mind, and Meaning is forthcoming.

Robert Stalnaker is Laurance S. Rockefeller Professor of Philosophy at MIT. He is the author of Inquiry (MIT Press 1984), Our Knowledge of the Internal World (Oxford University Press 2008), Mere Possibilities (Princeton University Press 2010), and two collections of papers, Content and Context (Oxford University Press 1999) and Ways a World Might Be (Oxford University Press 2003).

Daniel Stoljar is Professor of Philosophy at the Australian National University and an Australian Research Council Future Fellow. He is the author of Ignorance and Imagination (Oxford University Press 2006) and Physicalism (Routledge 2010) and co-editor of There's Something about Mary (MIT Press 2004) and Introspection and Consciousness (Oxford University Press 2012).

Matthew Stone completed his PhD in the Computer and Information Science Department at the University of Pennsylvania in 1998. Since then he has had an appointment in the Computer Science Department and Center for Cognitive Science at Rutgers, the State University of New Jersey. Stone has had visiting positions at the University of Edinburgh and the Universität Potsdam. He works on problems of meaning in human–human and human–computer conversation.

Brian Weatherson is Marshall M. Weinberg Professor of Philosophy at the University of Michigan. His recent research is on the philosophical significance of normative uncertainty, and on the role practical and theoretical interests play in the connections between knowledge, belief, and credences.

J.R.G. Williams is Professor of Theoretical Philosophy at the University of Leeds. Working in the philosophy of logic, language, metaphysics, and formal epistemology, he directs the ERC Nature of Representation project. Publications include “Decision Making under Indeterminacy,” Philosophers' Imprint (2014), “Counterfactual Triviality,” Philosophy and Phenomenological Research (2012), “Eligibility and Inscrutability,” Philosophical Review (2007).

Jessica Wilson is Associate Professor of Philosophy at the University of Toronto. Her primary research interests are in general metaphysics (especially modality and indeterminacy) and the metaphysics of science (especially inter-theoretic relations). Recent publications include “What Is Hume's Dictum, and Why Believe It?,” Philosophy and Phenomenological Research (2010), “Fundamental Determinables,” Philosopher's Imprint (2011), and “A Determination-Based Account of Metaphysical Indeterminacy,” Inquiry (2013). She is writing a book titled Metaphysical Emergence.

Part IBiography and New Work

1Intellectual Biography of David Lewis (1941–2001)Early Influences

Stephanie R. Lewis

This chapter is not a cradle-to-grave intellectual biography of David Lewis. In particular, it does not try to be comprehensive about the origins of his views or of how he came to hold them. Its purpose is to exhibit elements of the origins of the David Lewis we knew, philosopher and human being, and whose works we know. It describes important influences on David as a child, as an adolescent, and as a young man.

Let me begin with the last, and most important, of the forces that shaped the adult David, and made him the philosopher that he was. Not the only influence: nothing would have made David into the philosopher he was if he didn't have the wherewithal to begin with.

David, and usually I as well, made many visits to Australia: in 1971, in 1976, and nearly every year (except 2000, the year of David's kidney transplant) from 1979 right through 2001. He gave talks, went to talks, conversed with many people, and whenever he was in the right place at the right time he attended the Australasian Association of Philosophy conference. We toured around and enjoyed the urban amenities of Melbourne and, to a lesser extent, Sydney. And, starting in 1980, we went to the footy (Figure 1.1). David, who in general had no interest whatever in sport, somehow became a one-eyed supporter of the Essendon Football Club, in the Victorian (subsequently, the Australian) Football League. He was buried with his Essendon membership card in his pocket.

Figure 1.1

    Going home from the MCG after a loss to Collingwood, 1984.

© Stephanie Lewis 2013.

In July of 2002, nearly a year after David's death, I visited Australia by myself, and attended the Australasian Association of Philosophy conference. At the conference dinner, someone rose and asked us all to take a moment to remember David. After a minute or so, they shoved the microphone at me and asked me to say something. My only preparation for this was three glasses of wine. The first words that came out of my mouth were “Australia made David.” I must have said more, but I have no recollection at all of what it might have been.

1.1  Childhood

David was born into an academic household in Oberlin, Ohio, on September 28, 1941. He was the eldest of three children. His father, John D. Lewis, was professor of government at Oberlin College, where he taught from 1936 until his retirement in 1972. John was one of the great Oberlin teachers of his time, an Oberlin oligarch. As student and faculty member, he was at Oberlin for 41 years. John hadn't much standing as a scholar or researcher, especially in the later part of his career; his mark was on his generations of students, including Cecilia Kenyon, Kenneth N. Waltz, Sheldon Wolin, and W. Carey McWilliams Jr. Many others in other careers expressed their gratitude for his intellectual influence on them.

David's mother, Ewart Kellogg Lewis, was the scholar, by inclination, anyway. Unlike her husband, she came from an academic family. She was a graduate of the University of Wisconsin, also Phi Beta Kappa, having fled Wellesley College, and she held the PhD from the University of Wisconsin. She published Medieval Political Ideas (1954), a collection of critical translations and introductory essays of medieval philosophers and political theorists. She published no other scholarly works that I can find. Her reputation in medieval political theory survives.

She had no formal teaching career to speak of. Oberlin had, or was thought to have, a nepotism rule, so, other than casual employment in the history department, a post at Oberlin College was denied her. Neither she nor her husband was inclined to challenge this and, in any case, her employment at Oberlin ended after a squabble over the appointment of another faculty spouse. She did have an instructorship at Western Reserve University in Cleveland for three years.

She was an academic to the core, even though running the household fell to her. She taught her children to read early, and strongly encouraged David's native bookishness. When David was nine or ten years old he had an attack of polio, and, unrelated to this, a bone cyst in his thigh was discovered. He had a transplant of bone chips to cure the cyst, and as a consequence spent several weeks in, or mostly in, bed. Ewart taught him Latin. (He also took Latin in high school.) She also taught him to type properly.

David, born of two Phi Beta Kappa academics, was the eldest of three siblings. Being the eldest, and a little ungovernable, and being recognized from an early age as someone with intellectual curiosity and motivation, he was allowed to follow his own inclinations about his studies and activities.

The portion of this chapter dealing with David's childhood and early adolescence draws partly on Lewis family myth and folklore, but primarily on an autobiography he wrote, at the age of 14, in his next-to-last year of high school. It doesn't show much introspection: it has a lot of facts and family history in it. But it does describe his interests at various times. He, like most smart kids, read a lot and was interested in science. The autobiography has next to nothing in it about school friends, and most of the stories of family interactions are about his father. He was a solitary boy, planning and doing projects by himself, and reading. From what he says about various science projects his attention span appeared, even as a small child, to be unbounded. He wasn't unsocial but, if the autobiography is accurate, most of his interactions were with adults. There is only one mention of a friend of his own age.

It isn't as if David didn't care for his siblings, nor they for him. There is a photo of David from 1950, when he was nine years old, sitting in his father's study at their house, teaching school to his brother Donald, then five years old, and his sister Ellen, then three. They are listening raptly, their books open before them. The posture of David explaining something to an attentive audience will strike anybody who knew him as familiar (Figure 1.2).

Figure 1.2

    Photo by Ewart Lewis, November 1950.

For all practical purposes, David barely went to high school. Between the fall of 1954 and June of 1957, his high school years, he attended several courses at Oberlin, General Chemistry and Organic Chemistry among them, and took the exams and did the lab work. He had a chemistry lab in the basement of the Lewis house, where he did chemistry experiments and glassblowing. (And no, he never did nearly blow up the house.) One summer he worked on a project in a college lab, supervised by Professor Renfrow, in the Oberlin chemistry department. David Sanford remembers him from Oberlin chemistry classes as smarter and better prepared than any of the other students.1

David also showed early signs of the highmindedness that characterized him for his entire life. In a draft of his essay to accompany his application to Swarthmore College, written in the spring of 1957, he says:2

Last spring [of 1956], when a high school teacher was fired without reasons given, I was one of five students who drew up and circulated a petition asking the [Oberlin] Board of Education to give reasons. This petition, signed by about 60% of the High School students, was followed by a series of petitions and protests by teachers and citizens which finally resulted in a thorough investigation of the school situation by the Board of Education, and the replacement of the Superintendent of Schools by a new man who is initiating several much-needed reforms, I got very much interested in the whole situation and have been attending School board meetings regularly since then.

In the course of high school, his interests evolved and he continued to grow into the David we knew. Here is the last section of that autobiography: he was 14 when he wrote it, in 1955 [Figure 1.3], and there is no evidence whatever of ghostwriting (Ewart did type it) by either his mother or his father. David is uncharacteristically pompous, but the voice is his own.

Figure 1.3

    David Lewis at age 14.

Photo by Ewart Lewis.

LOOKING AHEAD

This, then, is the story up to now. But it is still incomplete. After all, one's first fourteen years are not the greater part of life; it is necessary to say something about the future. Moreover, this has been a record primarily of events: I have not yet said much about what I think of it all. And these are important; for an event is almost meaningless, as I see it, in comparison with an idea.

To take first the matter of concrete plans for the future, I must begin by saying that I am not sure of any of it. I expect to finish high school in the next year, taking, perhaps, some courses at Oberlin College also. After that, I intend to enter some college; I do not know where. I would like to go to a serious college, preferably a small one, where I can devote my time to work without being made to seem abnormal by doing so. I hope to get a complete liberal education, not just a technical one. It is for this reason that I am doing so much college work now; the programs for one majoring in a technical field in college are all too often so time-consuming that I would not be able to work on anything else. I expect to concentrate on technical studies in graduate school, but in college I want some freedom in arranging my schedule. I have been starting recently to consider the choice of a college, but this has been very difficult. The only place that seems to meet my requirements is Oberlin, and my parents and I agree that I should go away from home for college.

I am not sure what I want to study. Until very recently I expected to concentrate in chemistry, but I am losing some of my interest in it now. I do not know whether I am actually becoming tired of it simply because I have been concentrating on it so heavily for the last three years, or whether it is really not my proper field. Of course, it may also be that I am simply reacting to the very dull lectures which I hear at my chemistry class at the college.

I have many other things besides chemistry which I am interested in. I particularly like mathematics. Its logic, in particular, appeals to me. I do not like the mechanical processes where one puts in numbers and “turns the crank” to find a solution, nor do I like the problems of applied mathematics. But the basic concepts, the logic, the reaching of conclusions from reasoning alone, these are for me. I am also interested in some of the ideas of philosophy, metaphysics especially, although I have never yet made a detailed study of them. I have done some thinking of my own along these lines, and, of course, my results turn out to have been around for centuries.

I am interested, though not quite so much, in several other subjects. For instance, during my freshman year in high school I became very much interested in Latin and in the history of the Romans. I also am interested in other sciences, with the exception of biology, which leaves me quite bored. Probably the reason for this is that biology seems to me to be just a jumble of dull information, whereas the other sciences are logical structures.

After college I do not know just what I want to do. If I specialize in science, I will be able to get all sorts of industrial jobs. But this does not appeal to me. It is all a matter of intensely practical, routine work. My interest is not here so much as it is in the theory. Perhaps the best thing would be to enter the field of college teaching. Here I could work on any project I pleased. I would also be with people of my own sort. If I decide to work in some other field, I can say nothing of what I would be doing.

And now for the ideas I have been able to gather. My philosophy is, more than anything else, philosophy in the literal sense, love of knowledge; but not just knowledge; of understanding the realities of the universe, the reasons for everything. For I feel that there must be a cause for everything, that the past determines the future, that there must be certain natural laws, or perhaps only one, such that it would be possible to deduce all the features of the universe from it alone. This is a scientist's way of looking at the universe; I do not deny that there may be other ways which can reveal truths unknowable from the viewpoint of pure reason. Religion is such a way, so perhaps is art. My feeling about religion is that I cannot accept the elaborate system of details which an organized religion tends to build up, that it is in conflict with all reason. I do not find such a simple solution, though, to be the question of the existence of some kind of a God. My attitude is that it is impossible to prove or disprove the existence of God by logic. Indeed, not only impossible, but very foolish, as though I were to try to prove mathematically that my eyes are blue [they were]. The existence of God and the domain of logic are, I feel, absolutely separate. These are my views; I would not be so dogmatic as to say that there is any reason whatever to consider them correct.

I can see no other meaning in life except the gaining of knowledge; but this is rather meaningless, a rationalization of the fact that I have devoted myself so much to the gaining of knowledge, to the over-exclusion of other aspects of life. I can see that this is not desirable and I am trying to do something about it, although it is a slow and rather difficult business. Nevertheless, I feel that I am making some progress.

I feel that the world is good, although it is sometimes hard to see. But on the whole, I think it is good. As for my feelings on the problems of the world, I am rather idealistic. I think this is right, but it puts me somewhat at a disadvantage in practical affairs.

*  *  *

These are the events and the ideas of my life until now; it remains for the reader to judge them.

The End

David finished his senior year of high school but did not get a diploma: a civics requirement or something had not been met. So he was not a high school graduate, and thus was barred from serving in the Ohio National Guard (not that he wanted to). He did get a Merit Scholarship. Shortly before he turned 16, in September of 1957, he began his freshman year at Swarthmore College.

1.2  Swarthmore: The First Two Years

David had been solitary, though apparently not lonely, as a child. At Swarthmore he made friends, pretty much instantaneously. Several of these friendships endured for the rest of his life. Among his contemporaries were many future philosophers: among them, Allan Gibbard, Gil Harman and Peter Unger, and the linguist Barbara Hall, later Partee. He quickly became a part of the Swarthmore folkie scene.

He started out with the intention of majoring in chemistry, but took philosophy classes as well: in his sophomore year, he took Intro to Philosophy and Symbolic Logic. Most of his grades were As, but he did get some Bs in science courses.

Between his sophomore and junior years, the year he turned 18, the family spent a year at Oxford University. This was the year 1959–60. John had a research fellowship; though no publications followed upon it. He drove his new Jaguar sedan every day from their house in Wheatley to St Catherine's Society, which was not yet a college. He wore tweeds and a “Toad of Toad Hall” cloth cap. Ewart didn't have any college appointment. She read and conversed widely, and had a big part in the family excursions to various places in England and France, but her role was at home.

1.3  Oxford

David took a break from chemistry and physics. He did philosophy. He was treated by his father's college, St Catherine's Society (as it then was), as an undergraduate student, and assigned to the college philosophy tutor, John Simopoulos, who took one look at him and handed him off to Iris Murdoch. She was then a philosophy tutor at St Anne's College. He wrote weekly papers for her and discussed them in the one-on-one tutorials which were than a part of an Oxford undergraduate's study. He also attended lectures by, among others, Grice, Strawson, Ryle, and J.L. Austin. Despite repeated exposure to the ordinary-language culture of Oxford at the time, David never caught the disease.

Murdoch wrote letters of recommendation for David. Here is what she said about him (she sent him this letter also):

ST ANNE'S COLLEGE

OXFORD                June 15 1960

Telephone 57417

Mr David Lewis has worked with me on moral philosophy for the best part of three terms during his stay in Oxford. About half of this time was spent on studying traditional philosophers (Hume, Kant, also Mill, Moore and others) and the other half on looking at contemporary theories, especially in relation to freedom, and in discussing versions of Mr Lewis' own ideas on the latter subject. There is no doubt that Mr Lewis is a very gifted young man indeed and has a true talent for philosophy. Were he to remain in that subject (which unfortunately appears to be unlikely) I should advise him to forget about his own theories for a while and spend time grappling with difficult and unfamiliar ideas in the great philosophers of the past. This however is to say no more than that Mr Lewis is young and (naturally) still in need of education. His own ideas in fact are both interesting and original. His work has been excellent, certainly “alpha” throughout.

Iris Murdoch

Fellow and Tutor

(Reprinted by kind permission of Iris Murdoch.)

And here is a remark she made in a letter to him, about graduate school letters of reference she had been doing for him (reprinted by kind permission of the Estate of Iris Murdoch):

St Anne's College

Oxford

Nov 23 1961

Dear David,

Thanks for your letter [there is no copy of this letter in David's files]. I've sent off the two forms. (How is your emotional maturity nowadays? I found it hard to think of a mark for that.) I will do the other two testimonials very soon. I think I could commend Black & Malcolm for my (indirect) knowledge of them. Mrs Foot lately has had a very lively & profitable sojourn at Cornell. Anyway, best of wishes. I see you don't list Yale, rightly, I'm sure. Bulldog, bulldog etc.

Yours,

Iris

(Reprinted by kind permission of Iris Murdoch.)

1.4  Swarthmore: Second Two Years

David returned to Swarthmore as a philosophy major. (Swarthmore wouldn't let him do philosophy as a related minor along with a science major.) He did take advanced calculus, and two more physics courses, and he attended a course in linguistics at Penn with Henry Hiz. But it was otherwise all philosophy. He either took or sat in on most of the courses offered by the small philosophy department at Swarthmore. Jerry Shaffer was among David's favorite teachers. David continued to work in moral philosophy: a research project, supervised by Monroe Beardsley, resulted in Can Ethics be Reasonable?, a 40-page essay, typed, single-spaced, with practically no margins. (David kept a copy, which I have.) The typewriter is the one he used for the rest of his life.

In the essay he says that “personality is the sum of actual and potential behavior…” most of which patterns of behavior are “ideal forms of life.” Ethical thought consists in “compositing, presenting, elaborating, and relating these ideal forms of life.”3 To this view he adds: “To this model must be added social morality, a law-like system of regulating overt acts so as to reconcile conflicting interests of different people.”4 He concludes the essay thus:

To summarise: “good,” “right,” “ought,” “should,” “duty,” “obligation,” “fortunate,” “harm,” “benefit,” “desirable,” “wicked,” “immoral,” “choiceworthy,” (if there is any such word) etc. get their meaning among some or all of the following components:

Expression of decision; “internal motivation.”A small range of purely descriptive meanings, logically independent of attitude or conduct.In the case of “good” and perhaps “right” a large range of attributive descriptive meaning, at least sometimes with dependence on attitude and conduct on pain of irony or inappropriateness, if not of falsehood.To go proxy for reasons within a context of purpose. Perhaps with the implication on pain of irony or inappropriateness that the purpose is itself supported by empathically understood ideals.To go proxy for reasons, empathically understood ideals, which for some reason there is no need to detail. Some of these words are limited to going proxy for only certain classes of ideals. If these words have a purely ethical sense, this is it.5

He acknowledges the strong influence of several of Murdoch's published works in philosophy on the essay.

He graduated from Swarthmore in 1962, with high honors in philosophy and election to Phi Beta Kappa.

1.5  The Hudson Institute

Between 1962 and 1975, David was a part-time member of staff at the Hudson Institute, a policy think tank then concerned with issues in strategy and deterrence and nuclear weapons policy. He worked on research assignments, often with Herman Kahn, then Hudson's director, and with Max Singer. Hudson now has the reputation of being a conservative organization; then it was more concerned with the technical aspects of nuclear weapons, disarmament policy issues, and Kahn's interest in what Kahn called “futurology.” David developed an interest in game theory as a result of the Hudson work.

1.6  Graduate School: Australia I, Jack Smart

David arrived at Harvard in 1962, bringing with him his native mind–body identity theory, space–time four-dimensionalism, his Humeanism about causation, his Rylean behaviorism, his immunity to ordinary-language philosophy, and his disdain for political correctness. In the fall of 1963 he attended a seminar given by J.J.C. Smart, then visiting Harvard from Adelaide, on “Philosophical Problems of Space and Time.” This was the beginning of a friendship that lasted nearly 40 years, until David's death in 2001 (Figure 1.4). They conversed about philosophy and exchanged letters on philosophy.

Figure 1.4

    David Lewis and Jack Smart. Belcunda, South Australia, August 1971.

© Stephanie Lewis.

Jack invited David to give the Gavin David Young lectures at Adelaide University in August of 1971.

At Harvard, David worked with W.V. Quine and with Hilary Putnam, going to MIT for Putnam's seminars before Putnam moved to Harvard. He also went to linguistics seminars at MIT. He admired Quine's philosophical style and prose style as well; David learned to write, and speak, clearly and concisely about even the most technical matters in philosophy. He used to quote C.G. Hempel with approval: “it adds neither to the rigor of the argument nor the clarity of the exposition to say that a man M crossed the street S.”

David's thesis, Conventions of Language, grew out of his interest in language, encouraged by Quine, and also out of David's own continuing interest in game theory. Metaphysics was not yet at the center of his interests. The game theory aspects of his theory of convention owed a lot to his Hudson Institute work and to conversations with Thomas Schelling. Schelling's prose style, in The Strategy of Conflict (1960), also served as a model for David's writing.

1.7  UCLA

David and I went to UCLA in 1966, he as an assistant professor and me as a graduate student in philosophy. He got interested in formal semantics, and had many discussions with Richard Montague and with Barbara Hall Partee. David went to Montague's seminars on formal semantics. He and Hans Kamp had a lot of discussion on the subject, and to a lesser extent David conversed with David Kaplan as well. And all the while he wrote and he wrote and he wrote.

1.8  Australia II: David Armstrong

In 1968 David Armstrong was visiting at Stanford. He and David Lewis met and talked. This began a friendship and a philosophical interchange, carried on in letters and conversations, for the rest of David's life.

1.9  Australia III: The First Visit

When we arrived in Sydney in July of 1971, we stayed for several days with David Armstrong and his first wife, Madeleine. This was the beginning of the philosophical conversations between the two Davids.

In August of 1971 David delivered the Gavin David Young lectures at Adelaide University. The topic was time travel. This was the first of, if I have counted right, 26 visits. This was for two months, and gave David the chance to go around to most of the philosophy departments at Australian universities – we missed Perth – and give talks, go to talks, and get to know people. And he wrote and he wrote and he wrote.

The effect on David cannot be overstated. He found many friends, and many, many opportunities to discuss matters of common interest. And he enjoyed himself, not least because he didn't have any teaching or departmental responsibilities. Like the rest of his Australia trips, it amounted to study leave.

1.10  Princeton

David arrived at Princeton in the fall of 1971, where he taught for the rest of his life. This essay looks at David's early life, and thus doesn't say much of anything about his Princeton career. It is worth mentioning that he had over 30 PhD students, either entirely or partly under his supervision, many of whom now ornament the profession.

1.11  Australia IV: 1976

David made his second visit to Australia in July and August of 1976. David and Madeleine Armstrong invited us to spend a weekend with them at Glenogil, the house of their friends Pat and Rosemary Ryan, near Avenel, Victoria. The two Davids walked, and talked, for a large part of the daylight hours of two days. This visit firmly established the friendship between the two Davids (Figure 1.5). They never agreed about much: DKL was by then a modal realist, DMA had no use at all for more than one possible world. They disagreed fundamentally about universals, and about properties. But they never stopped talking about philosophy. The Lewis–Armstrong correspondence is by far the longest, and richest, and most detailed of all of David Lewis's correspondences.

Figure 1.5

    The Two Davids, Glenogil Station, Victoria. August 1976.

© Stephanie Lewis.