Introduction

The Soul of Races

The Limits of the Variability of the Character of Races

The Psychological Hierarchy of Races

The Progressive Differentiation of Individuals and Races

Formation of the Historical Races

The Various Elements of a Civilization Considered as a Manifestation of the Soul of a People

How Institutions, Religions and Languages Are Transformed

How the Arts Are Transformed

How the Soul of Peoples Is Responsible for Their Institutions

Application of Preceding Principles to the Comparative Study of the Evolution of the United States of America and of the Spanish-American Republics

How the Modification of the Soul of Races Affects the Historical Evolution of Peoples

The Role of Ideas in the Life of Peoples

The Role of Religious Beliefs in the Evolution of Civilizations

The Role of Great Men in the History of Peoples

How Civilizations Fade Away and Die Out

General Conclusions