Pablo Jensen is a physicist at Ecole Normale Supérieure and former director of the Complex Systems Institute in Lyon. He founded the French scientific cafés in 1997 and authored "Atoms in My Cappucino ?! Can physics explain everything?" (in French, Seuil, 2001, more than 11000 copies sold so far). He has published a hundred articles in international journals in physics, economics and sociology. Presently, he works with social scientists to create formal tools that enrich our understanding of society.