William James Durant (November 5, 1875 – November 7, 1981) was a prolific American writer, historian, and philosopher. He is best known for The Story of Civilization, 11 volumes written in collaboration with his wife Ariel Durant and published between 1935 and 1975. He was earlier noted for The Story of Philosophy, written in 1926, which one observer described as "a groundbreaking work that helped to popularize philosophy."[1]

He conceived of philosophy as total perspective, or, seeing things "sub specie totius," a phrase derived from Spinoza's "sub specie aeternitatis."[2] He sought to unify and humanize the great body of historical knowledge, which had grown too voluminous and become fragmented into esoteric specialties, and to vitalize it for contemporary application.[3] Durant was a gifted prose stylist and storyteller who won a large readership in great part because of the nature and excellence of his writing, which, in contrast to formal academic language, is lively, witty, ornate and often epigrammatic.

Will and Ariel Durant were awarded the Pulitzer Prize for General Non-Fiction in 1968 and the Presidential Medal of Freedom in 1977.

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.