Man and Environment

Abstract

I AM under the impression that it is recorded somewhere that Darwin expressed the following opinion:—He considered the fact that when man appears he appears, not as a “blind” subject of his environments, but with power to determine largely, not only his own environments, but those of generations of men succeeding his own generation; and, faced by this fact, he expressed a doubt whether, when man appears, some new factor may not come into play in “natural selection” (cf. “The Descent of Man,” 2nd ed., p. 613, lines 15 to end of paragraph). But I cannot find the reference. Could any reader of NATURE assist me?