Decline of Tiwanaku and the Wari Empire

Timeline

1. 900–1000Tiwanaku · BoliviaIntensifying highland drought caused the raised-field agricultural system on which Tiwanaku depended to fail, and falling lake levels dried up irrigation sources. Population dispersed from the central city to peripheral areas, and grand temples and structures such as the Akapana Pyramid gradually fell into ruin.
2. 950–1000Wari · PeruThe population of the Wari Empire's capital on the Peruvian coast plummeted, its administrative network collapsed, and subordinate centers achieved independence one after another. The empire's unified pottery style and religious symbolic system no longer held, and the political integration of the central Andean Middle Horizon came to an end.
3. 960–1000Andes Mountains · Andes MountainsAfter the decline of Tiwanaku and Wari, the Andes entered a Postclassic era of numerous local chiefdoms. Coastal kingdoms such as Chimor and Lambayeque and highland local powers each developed independently, until the Inca Empire reunified the Andean world in the 15th century.