ABSTRACT
When intelligence evolved to the high level which it reached in human beings, it produced a marked change in the process of adaptation. In general, animals have accepted nature as it is and have evolved the bodily organs or modes of behavior necessary to adjust themselves to nature’s demands. Man, with his superior intelligence, has to a marked degree reversed the direction of adaptation. He uses his mental powers to change his natural environment, to adjust it to his needs and wishes. He does not merely accommodate himself to the world about him, as do the lower animals.
