PREFACE
Reading edition
In the preparation of Chapters II, III, and VI of this book I have drawn on a University of California syllabus, “Three Essays on the Antiquity and Races of Man”; for Chapter VII, on an article “Heredity, Environment, and Civilization” in the American Museum Journal for 1918; and Chapter V makes use of some passages of “The Languages of the American Indians” from the Popular Science Monthly of 1911. In each case there has been revision and for the most part rewriting.
Whatever quality of lucidity the volume may have is due to several thousand young men and women with whom I have been associated during many years at the University of California. Without their unwitting but real co-authorship the book might never have been written, or would certainly have been written less simply.
A. L. K.
Berkeley, California, January 22, 1923.