The Difference of Man and the Difference It Makes . Mortimer J. Adler. Holt, Rinehart and Winston, New York, 1967. xvi + 395 pp. $7.95. Based on the Encyclopaedia Britannica Lectures, Chicago, 1966.; Robots, Men and Minds . Psychology in the Modern World. Ludwig von Bertalanffy. Braziller, New York, 1967. x + 150 pp. $5. Based on the Heinz Werner Inaugural Lectures, Clark University, 1966.

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