The first edition of this book appeared in 1953; the second, revised and enlarged, in 1960. The present, third edition is essentially a reprint of the second, except for the correction of a few misprints and the following remarks, which refer to some recent publications* and replace the brief preface to the second edition. Neither Eudemus nor Theophrastus, so I said (p. 208 . ) knew a branch of theoretical philosophy the object of which would be something called 0'. 1 0'. 1 andwhich branch wouldbedistinct from theology. And there is no sign that they found such a branch (corresponding to what...

Part of the material contained in the present book was presented in the form of a lecture course given by me at the University of Oxford in I962 as a Fulbright Senior Lecturer. Scripps College and the Claremont Graduate School contributed to the cost of research and publication. The staff of the Honnold Library, Claremont, California, was extremely obliging in matters concerning inter-library loans. The page proofs were read in part by Professor Richard Walzer, the University of Oxford. Mr. Salih Alich, Blaisdell Institute, Claremont, California, corrected many errors occurring in the...