As a work of political theory, Ideology and Utopia has satisfied almost no one. Mannheim's critics extend across a wide range of viewpoints, from Parsons, Merton, Bendix, Popper, and Shils on one side to Marcuse, Hork-heimer, Lukacs, and Adorno on the other. Neither Marxists nor non-Marxists have found much to their liking in the book, and the rather easy dismissal of Mannheim's arguments by such influential thinkers on both sides of the political spectrum has certainly constituted a major obstacle to any serious consideration of the position he developed in Ideology and Utopia. For, I shall argue, the arguments contained in that work, when they have not been neglected altogether, have been poorly understood by those individuals whose writings exercise a dominant influence upon the thinking of contemporary social scientists.