In Classical Greece, slaves were of two main varieties. Those who served their Spartan masters and those who became slaves due to debt. As for the numbers, Kagan says the comparison between slaves and freemen, and between slave owners and those who didn't, is similar to that of the American South during the Civil War . Unlike American slavery, a slave in Greece could earn or buy their freedom. Slavery was not considered a life sentence for many people in Hellenistic Greece. In fact, during times of war, slave owners sometimes freed all of their slaves and granted them citizenship so that they could row on warships. Slavery in the ancient world seems to have had its limits; freedom could be bought or earned. According to Baker, the Olympics became a major part of how the Greeks honored their gods. Competitors competed in extremely violent games, from chariot races in which a single person usually ended up pinned to extreme versions of wrestling that caused serious bodily injury. Kagen says team sports weren't part of ancient games. The Olympics even allowed participants to be deified. Athletes became heroes and celebrities even when the games were not in progress. The first professional athletes came from the ancient Greek Olympic Games. According to Kagan, these athletes earned much higher salaries than the average worker. Baker says that for the ancient Greeks, sport and physical activity were closely linked to the mental and physical well-being of all humans. Plato believed that the ideal body was a harmonized mind and body. The classical Greeks are credited with creating another form of popular entertainment. According to Kagan, theater was part of Greek culture. From tragedies to comedies, plays were a large part of Greek life. Most tragedies were performed in a hall that could accommodate 30,000