Book excerpt: "History of Twentieth-Century Philosophy of Science" is a short history that examines the philosophies of science of Ernst Mach, Pierre Duhem, Rudolf Carnap, Willard Van Quine. Niels Bohr, Albert Einstein, Werner Heisenberg, Karl Popper, Alfred Lande, James Conant, Thomas Kuhn, Ernest Nagel, Dudley Shapere, Paul Feyerabend, Russell Hanson, Mary Hesse, David Bohm, Herbert Simon, Trygve Haavelmo, Welsey Mitchell, Max weber, Talcott Parsons, and George Lundberg. The principal thesis of the book are firstly the emergence of the contemporary pragmatism due to philosophers' reflections on the modern quantum theory, secondly the retarded condition of social science due to social scientists' fidelity to romanticism, and thirdly the newly emerging area of computerized artificial intelligence discovery systems. The three traditions of romanticism, positivism, and contemporary pragmatism are discussed in terms of four philosophy-of-science topics: the aim of science, scientific discovery and theory development, scientific criticism, and scientific explanation. The price is $10.00 US per copy, all taxes and shipping costs included. Add $6.00 US for shipping outside the U.S. Prepayment is required of all noninstitutional and nontrade buyers. Send purchase order or check prepayment to: Thomas J. Hickey, P.O. Box 229, Oak Park, IL 60303.