Slavery has been a part of human civilization for thousands of years: the ancient Egyptians, Greeks and Romans all kept people in bondage. Although slavery has sparked numerous wars and rebellions including the Civil War in America, many societies have been unwilling to give up the economic benefits of cheap labor that slavery ensures. Across the modern world, some 21 million people remain in bondage in Asia, Africa, Europe, and even North America.

Visual chronology: Important events in the history of slavery -- What conditions led to slavery? -- Slaves of the medieval era -- Slavery in the New World -- Slavery in the modern era -- What is the legacy of slavery? -- Important people in the history of slavery.