The Incas expanded their empire not only through war but also through diplomatic means and threats of violence—and they knew how to keep what became theirs.
They were good organizers, ruling one of the best-run empires in history. Without telephones, cars, or even a way to write a letter, they kept a tight hold on their subjects. In a hundred years, they conquered millions of people who had languages and customs quite different from their own and made them all a part of the Inca empire. Working together, officials spread Inca religion, laws, and language throughout the land, creating a united empire.
