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Any one interested in the questions what is sin, how did man originate, and how did the fight begin between animal instincts and conscience will find this book intensely interesting and stimulating. The author has previously published two books dealing with these questions, namely, "The Ascent of Man by Means of Natural Selection" and "Darwin's Theory applied to Mankind." This book contains much taken from these earllier ones, with a fundamental idea added. The fundamental idea which unlocks the door and reveals the explanation of the mystery is that man was not originally a social animal; each family lived apart and hated its neighbors. Man was forced to become a social animal when by changing climate he was driven down from the trees where he formerly lived, became of necessity a hunter and a plainsman walking on two feet and began to talk and to make weapons for himself and
What Is Man? Evolution's Answer. JAMA. 1950;142(17):1396. doi:10.1001/jama.1950.02910350066032