relationships were tied closely to social class. There were three strata: nobles, commoners, and slaves (slavery was abolished in 1909 by the Dutch East Indies government). Class was inherited through the mother. It was taboo, therefore, to marry "down" with a woman of lower class. On the other hand, marrying a woman of higher class could improve the status of the next generation. The nobility's condescending attitude toward the commoners is still maintained today for reasons of family prestige. Nobles, who were believed to be direct descendants of the descended person from heaven, lived in tongkonans, while commoners lived in less lavish houses (bamboo shacks called banua). Slaves lived in small huts, which had to be built around their owner's tongkonan. Commoners might marry anyone, but nobles preferred to marry in-family to maintain their status. Sometimes nobles married Bugis or Makassarese nobles. Commoners and slaves were prohibited from having death feasts. Despite close kinship and status inheritance, there was some social mobility, as marriage or change in wealth could affect an individuals status. Wealth was counted by the ownership of water buffaloes. Slaves in Toraja society were family property. Sometimes Torajans decided to become slaves when they incurred a debt, pledging to work as payment. Slaves could be taken during wars, and slave trading was common. Slaves could buy their freedom, but their children still inherited slave status. Slaves were prohibited from wearing bronze or gold, carving their houses, eating from the same dishes as their owners, or having sex with free women—a crime punishable by death. Religious affiliation Toraja's indigenous belief system is polytheistic animism, called aluk, or "the way" (sometimes translated as "the law"). In the Toraja myth, the ancestors of Torajan people came down from heaven using stairs, which were then used by the Torajans as a communication medium with Puang Matua, the Creator. The cosmos, according to aluk, is divided into the upper world (heaven), the world of man (earth), and the underworld. At first, heaven and earth were married, then there was a darkness, a separation, and finally the light. Animals live in the underworld, which is represented by rectangular space enclosed by pillars, the earth is for mankind, and the heaven world is located above, covered with a saddle-shaped roof. Other Toraja gods include Pong Banggai di Rante (god of Earth), Indo' Ongon-Ongon (a goddess who can cause earthquakes), Pong Lalondong (god of death),