Chapter 2

THE DIVERGENT DIRECTIONS OF THE EVOLUTION OF LIFE--TORPOR, INTELLIGENCE, INSTINCT

General idea of the evolutionary process--Growth--Divergent and complementary tendencies--The meaning of progress and of adaptation 98

The relation of the animal to the plant--General tendency of animal life--The development of animal life 105

The main directions of the evolution of life: torpor, intelligence, instinct 135

The nature of the intellect 151

The nature of instinct 165

Life and consciousness--The apparent place of man in nature 176