This essay in social and intellectual history advances the thesis that Western social philosophy arose during the disintegration of the ancient Greek and Roman communities and has been preoccupied ever since with the problem of community lost and community to be gained. As the author shows, Western ideas of moral authority, freedom, consensus, and personality take on their distinctive character as aspects of Westernman's search tor community. Six major types of community in Western life and thought are distinguished by Professor Nisbet: military, political, religious, revolutionary, ecological, and plural. Each of these is presented as a continuing current in Western history and as a vital context to the central ideas of social philosophy. From Plato and Aristotle down to such moderns as Marx, Tocqueville, Weber, Kropotkin, and Fanon we see the dominant ideas and perspectives of Western thought as responses to conflicts and crises--above all, to those affecting man's perennial quest for community.