What Was the Enlightenment?

The Enlightenment was an intellectual and cultural movement, roughly 1650 to 1800, in which writers across Europe and the Americas argued that reason, evidence and open debate could improve knowledge, government and everyday life. It grew out of the Scientific Revolution, whose discoveries suggested that nature followed regular laws that people could understand. Thinkers then turned the same confidence on religion, law, economics and education, questioning customs that rested only on tradition or authority.

It was never a single program: some figures were cautious reformers who worked with kings and churches, while others called for sweeping change. Historians also stress its limits, because many champions of liberty excluded women, enslaved people and non-Europeans. Studying the Enlightenment explains where ideas such as religious toleration, separation of powers and human rights came from, and why those ideas are still debated.