The document summarizes key aspects of the Enlightenment period in the 18th century. During this time, philosophers and thinkers argued that reason should be the foundation of society and guide progress. They explored ideas around what it means to be rational and the social contract theory that government exists to serve the people. The Enlightenment led to the creation of new literature, philosophy works, and the first encyclopedia. It inspired revolutions in America, France, and Haiti. However, it also increased racism and paved the way for imperialism by marking some societies as "enlightened" and others as "unenlightened."