ABSTRACT
Behaviour, which has been adapted in the course of evolution, is quite different from intelligent purpose in human beings. The human mind must have been adapted to the conditions of life just as the human body has been. Psychologists speak of fundamental race-instincts, the instinct of self-preservation, the instinct of sex and the social instincts. Human intelligence, since the beginning of pre-history, has been applied to practical ends, to outwitting man’s brute-competitors and to making serviceable use of natural laws. Human intelligence is surely a specialized product, for it is concentrated on the external world as presented by the senses; and is adapted to work with the senses. The rudiments of intelligence appear in some of the higher animals, particularly in the ape-genus; but, apart from this, intelligence is looked upon as a purely human endowment.
