What forces lead to democracy's creation? Why does it sometimes consolidate only to collapse at other times? Written by two of the foremost authorities on this subject in the world, this volume develops a framework for analyzing the creation and consolidation of democracy. It revolutionizes scholarship on the factors underlying government and popular movements toward democracy or dictatorship. Daron Acemoglu and James Robinson argue that different social groups prefer different political institutions because of the way they allocate political power and resources. Their book, the subject of a four-day seminar at Harvard's Center for Basic Research in the Social Sciences, was also the basis for the Walras-Bowley lecture at the joint meetings of the European Economic Association and Econometric Society in 2003 and is the winner of the John Bates Clark Medal.