In this stunning philosophical accomplishment, McCumber (Northwestern Univ. and author of Poetic Interaction, 1989, and The Company of Words, 1993) sheds important new light on the history of substance metaphysics and Heidegger's challenge to metaphysical thinking. He carefully analyzes use of the concept of ousia in Aristotle, Aquinas, Descartes, Hobbes, Spinoza, Leibniz, Locke, and Hume. He finds in Aristotle three defining aspects of ousia: 1) everything occurs only within a boundary; 2) through disposition, everything is hierarchically arranged, and 3) through active initiative, form imposes itself on matter. He shows how the metaphysical concept of ousia, by defining the way things are, justifies as rational such social structures as slavery, colonialism, and male domination of women. In each case, rational form imposes itself on irrational matter. Historically, this has offered a conceptual rationale for oppression, but the analysis of Heidegger offers a positive alternative. Heidegger blurs ousia with metaphysics of presence; his thinking breaks through boundaries, does not impose a top-down hierarchy on nature and society, and does not relegate some things or people to the category of matter. Thus, significantly, Heidegger's critique of substance metaphysics offers a way beyond oppressive thinking. Well-documented, brilliant, definitely a major contribution to philosophy! Upper-division undergraduates and above.R. E. Palmer, emeritus, MacMurray College, 2000apr CHOICE.