and Evolution) that it "offers perhaps the clearest, most readable, succinct and informative popular account of the subject ever penned. It was here that [Huxley] first expounded his own version of what later developed into the evolutionary synthesis". The Science of Life is also notable for its introduction of modern ecological concepts. It is also notable for its emphasis on the importance of behaviorism and Jung's psychology. Toward the end The Science of Life strays from the scientific to the moral realm and devotes a chapter (Book Eight, Ch. VIII: "Modern Ideas of Conduct") to practical moral advice to the reader, advising him (the masculine pronoun is used throughout, a universal practice circa 1930): "After his primary duties to himself, the first duty of Mr. Everyman to others is to learn about himself, to acquire poise and make his persona as much of a cultivated gentleman as he can. He has to be considerate. He has to be trustworthy." In its last pages, Wells emphasises the lack of "credibility" of personal immortality, and advocates "realization of [one's] participation in a greater being with which he identifies himself", whether this be "the Deity" or "Man". Publication record The Science of Life: a summary of contemporary knowledge about life and its possibilities was first issued in 31 fortnightly parts published by Amalgamated Press in 1929–30, bound up in three volumes as publication proceeded. A mail-order version of the book was also published, though this was dropped after the stock market crash. It was first issued in one volume by Cassell in 1931, and reprinted in 1934 and 1937; a popular edition, fully revised, with a new preface by H. G. Wells, appeared in 1938. It was again published as separate volumes by Cassell in 1934–1937: I The living body. II Patterns of life (1934). III Evolution—fact and theory. IV Reproduction, heredity and the development of sex. V The history and adventure of life. VI The drama of life. VII How animals behave (1937). VIII Man's mind and behaviour. IX Biology and the human race. In New York, it was published by Doubleday, Doran & Co. in 1931, 1934 and 1939; and by The Literary Guild in 1934. Doubleday also issued a four-volume limited edition of the work in 1931, limited to 750 sets, with the first volume autographed on the limitation page by the three authors. Three of the Cassell spin-off books