This document provides an overview of the Enlightenment period and key Enlightenment thinkers. It defines the Enlightenment as a period from the 1600s-1700s where educated Europeans changed their outlook to see reason as key to human progress. Major figures discussed include Thomas Hobbes, who believed humans are naturally selfish and life without government would be "nasty, brutish, and short." The document aims to help students understand the historical roots and major ideas of the Enlightenment, including challenges to traditional authority and emphasis on individual rights and reason over tradition.