Pre-Columbian Mesoamerica the most common forms of slavery were those of prisoners-of-war and debtors. People unable to pay back a debt could be sentenced to work as a slave to the person owed until the debt was worked off. Warfare was important to the Maya society, because raids on surrounding areas provided the victims required for human sacrifice, as well as slaves for the construction of temples. Most victims of human sacrifice were prisoners of war or slaves. According to Aztec writings, as many as 84,000 people were sacrificed at a temple inauguration in 1487. Slavery was not usually hereditary; children of slaves were born free. In the Inca Empire, workers were subject to a mita in lieu of taxes which they paid by working for the government. Each ayllu, or extended family, would decide which family member to send to do the work. It is unclear if this labor draft or corvée counts as slavery. The Spanish adopted this system, particularly for their silver mines in Bolivia.
Other slave-owning societies and tribes of the New World were, for example, the Tehuelche of Patagonia, the Comanche of Texas, the Caribs of Dominica, the Tupinambá of Brazil, the fishing societies, such as the Yurok, that lived along the coast from what is now Alaska to California, the Pawnee and Klamath. Many of the indigenous peoples of the Pacific Northwest Coast, such as the Haida and Tlingit, were traditionally known as fierce warriors and slave-traders, raiding as far as California. Slavery was hereditary, the slaves being prisoners of war. Among some Pacific Northwest tribes about a quarter of the population were slaves. One slave narrative was composed by an Englishman, John R. Jewitt, who had been taken alive when his ship was captured in 1802; his memoir provides a detailed look at life as a slave, and asserts that a large number were held.