A Dublin native, Robert Leonard writes about the history of twentieth-century economics and the social sciences in scientific and cultural context. His work has appeared in a range of journals in economics and the history of science, including the Economic Journal, History of Political Economy and Isis. His 1995 article in the Journal of Economic Literature, from which the present book grew, won the Best Article Award of the History of Economics Society. Leonard is Professor of Economics at the Université du Québec à Montréal.

• Introduction; Part I. Struggle and Equilibrium: From Lasker to von Neumann: 1. 'The strangest states of mind': chess, psychology and Emanuel Lasker's Kampf; 2. 'Deeply rooted yet alien': Hungarian Jews and mathematicians; 3. From Budapest to Göttingen: an apprenticeship in modern mathematics; 4. 'The futile search for the perfect formula': von Neumann's minimax theorem; Part II. Oskar Morgenstern and Interwar Vienna: 5. Equilibrium on trial: the young Morgenstern and the Austrian school; 6. Wrestling with complexity: Wirtschaftsprognose and beyond; 7. Ethics and the excluded middle: Karl Menger and social science; 8. From Austroliberalism to Anschluss: the Viennese economists in the 1930s; Part III. From War to Cold War: 9. Mathematics and the social order: von Neumann's return to game theory; 10. Ars combinatoria: writing the theory of games; 11. Morgenstern's catharsis; 12. Von Neumann's war; 13. Social science and the 'present danger': game theory and psychology at the RAND Corporation, 1946–60; Conclusion.

'Robert Leonard toiled for more than a decade on his manuscript on the creators and creation of game theory. His nuanced account is 'thick history' at its best; he captures the protagonists and their milieu with precision and flair. It is a signal achievement.' Bruce Caldwell, Duke University