In three volumes, a distinguished group of scholars from a variety of disciplines in the natural and social sciences, the humanities and the arts contribute essays in honor of Robert S. Cohen, on the occasion of his 70th birthday. The range of the essays, as well as their originality, and their critical and historical depth, pay tribute to the extraordinary scope of Professor Cohen's intellectual interests, as a scientist-philosopher and a humanist, and also to his engagement in the world of social and political practice. In Science, Politics and Social Practice, (Volume II of Essays in Honor of Robert S. Cohen), an international group of scholars -- philosophers, sociologists, historians, and political scientists -- discuss issues at the cutting edge of contemporary social and political thought, and its bearing on science. Several essays discuss the relations of Marxism to science, and specifically, to the philosophies of science of Carnap and Popper, as well as Soviet Marxism, and the effects of Stalinism on Soviet science. There are also essays on the philosophy and methodology of the social sciences, on questions of method and aim in historical narrative, on the issue of cultural relativism, and more.