Persons and Minds is an inquiry into the possibilities of materialism. Professor Margolis starts his investigation, however, with a critique of the range of contemporary materialist theories, and does not find them viable. None of them, he argues, "can accommodate in a convincing way the most distinctive features of the mental life of men and oflower creatures and the imaginative possibilities of discovery and technology" (p. 8). In an extraordinarily rich analysis, Margolis carefully considers and criticizes mind-body identity theories, physicalism, eliminative materialism, behaviorism, as...