II MAN AS A FACTOR IN SOCIAL EVOLUTION The contribution of the human race to its own development is the distinguishing feature in social evolution. That prompt and simple reaction to the environment by which the evolution of sub-human species has been accomplished, is complicated, with us, by a delayed and uncertain reaction, due to stored energy and to the internal environment of man’s conscious mind. We are of course modified by conditions, and transmit the modification through heredity. The results in social formation and conduct are clear and startling, but if man could in no way alter these results or select among the causes, to study them would be painful and useless. Man has, however, a limited private supply of energy, his storage battery of nerve force; not initial with him, but temporarily his to use; and he has also, in the imaged world of his mind, an environment which leads him to use that personal energy according to his separate views of life; thus he can, and does, modify his conduct to a considerable degree. His contribution varies widely in extent; some individuals living very largely from personal initiative, and some almost without; it varies as widely in value; being sometimes of a most advanced grade, and at others distinctly primitive and reversionary. We have heretofore gravely overestimated the relative extent of this personally modified conduct or telic action, as compared with the conduct which is the result of unconsciously transmitted forces, or genetic action. In the dawn of human consciousness the field of personal conduct was most prominent to man, and he took small note of what things he did under the unobstructed action of natural tendencies.