Robert A. Dahl, Sterling Professor Emeritus of Political Science and Sr. Research Scientist Sociology, is a member of the National Academy of Sciences, the American Philosophical Society and the American Academy of Arts and Sciences, a corresponding member of the British Academy, and a past President of the American Political Science Association. His publications include Congress and Foreign Policy; Politics, Economics and Welfare (with C. E. Lindblom); A Preface to Democratic Theory; Who Governs? Democracy and Power in an American City; After the Revolution?; Polyarchy; Size and Democracy (with E. R. Tufte); Dilemmas of Pluralist Democracy; A Preface to Economic Democracy; Controlling Nuclear Weapons: Democracy Versus Guardianship; Democracy and Its Critics; Toward Democracy: A Journey; On Democracy; How Democratic is the American Constitution?, Politica e virtu' , La teoria democratica de nuovo secolo, After the Goldrush: Growing up in Skagway and On Political Equality.

The idea that the opposition has a right to organize and to appeal for votes against the government in elections and in parliament is one of the most important milestones in the development of democratic institutions. Mr. Dahl and nine collaborators analyze the role of the opposition in Austria, Belgium, France, Germany, Great Britain, Italy, the Netherlands, Norway, Sweden, and the United States. In introductory and concluding chapters, Dahl compares the patterns of opposition in these countries and makes predictions for the future. He carries forward on the basis of this evidence the theory of a pluralistic society he has explored in earlier books such as Who Governs?