The last half of the twentieth century has been an era of democratic triumph. The main antidemocratic regimes - communist, facist, Nazi - have disappeared, and new democracies are emerging vigorously or tentatively throughout the world. In this accessible and authoritative book, one of the most prominent political theorists of our time provides a primer on democracy that clarifies what it is, why it is valuable, how it works, and what challenges it confronts in the future. Robert Dahl begins with an overview of the early history of democracy. He goes on to discuss differences among democracies, criteria for a democratic process, basic institutions necessary for advancing the goals of democracy, and the social and economic conditions that favor the development and maintenance of these institutions. Along the way, he illustrates his points by describing different democratic countries, explaining, for example, why India, which seems to lack most of the conditions for a stable democracy, is nevertheless able to sustain one. Dahl answers such puzzling questions as why market-capitalism can both favor and harm democracy. And he concludes by examining the major problems that democratic countries will face in the twenty-first century, problems that will arise from complexities in the economic order, from internationalization, from cultural diversity, and from the difficulty of achieving an adequate level of citizen competence. This book is published by Yale University Press.Robert A. Dahl, Sterling Professor of Political Science Emeritus at Yale University, is also author of Who Governs?, Democracy and Its Critics, and other books.