The Lessons of History is a book by historians Will Durant and Ariel Durant. In The Lessons of History the authors provided a summary of periods and trends in history they had noted upon completion of their momentous eleven volume The Story of Civilization. Will Durant stated that he and Ariel "made note of events and comments that might illuminate present affairs, future probabilities, the nature of man, and the conduct of states." The book thus presents an overview of the themes and lessons observed from 5000 years of world history examined from 13 perspectives such as geography, biology, race, character, morals, religion, economics, socialism, government, war, growth and decay and progress.