of minute parts and, in some cases, its emotional enhancement. Thus instinct, or this immediate adjustment to immediate environment, becomes more prominent in its function of directing action for the purposes of the living organism. The world is a community of organisms; these organisms in the mass determine the environmental influence on any one of them; there can only be a persistent community of persistent organisms when the environmental influence in the shape of instinct is favourable to the survival of the individuals. Thus the community as an environment is responsible for the survival of the separate individuals which compose it; and these separate individuals are responsible for their contributions to the environment. Electrons and molecules survive because they satisfy this primary law for a stable order of nature in connection with given societies of organisms.
Reflex action is a relapse towards a more complex type of instinct on the part of organisms which enjoy, or have enjoyed, symbolically conditioned action. Thus its discussion must be postponed. Symbolically conditioned action arises in the higher organisms which enjoy the perceptive mode of presentational immediacy, that is to say,
