The empire continued to grow with no end in sight. William H. Isbell states that "Tiahuanaco underwent a dramatic transformation between AD 600 and 700 that established new monumental standards for civic architecture and greatly increased the resident population." Tiwanaku continued to absorb cultures rather than eradicate them.... The elites gained their status by the surplus of food they gained from all of the regions and then by having the ability to redistribute the food among all the people. This is where the control of llama herds became very significant to Tiwanaku....Later came the Inca and the Spanish.
Tiwanaku disappeared around AD 1000 because food production, their main source of power, dried up. The land was not inhabited for many years after that.