Julian Huxley: Evolution in Action

Starting with the first one-celled organisms, a world famous biologist analyzes the broad processes of evolution: the pattern of genetic structure; the formation, adaptation, and specialization of species; heredity; mutations; and natural selection--in short, the mechanisms and principles common to all life.
Passing from the general to the specific, he lucidly explains how, in advancement toward general efficiency, new capacities appear, such as the ability to fly or to learn by experience--capacities that may lead a species to a blind alley of specialization, or to further progress, or even (uniquely with man) to a point where the species may learn how to control the course of its own development.