Wari, The
The Wari people are credited with the development of the first Andean empire, which “controlled most of the Peruvian highlands and coast, integrating disparate cultures and building a network of roads that the Inca would later repurpose for their own empire. But its collapse around 1000 C.E. amid a severe drought unleashed centuries of violence and deprivation, according to new research presented here last week at the World Congress on Mummy.” (a)
(a) https://www.science.org/content/article/waris-grisly-end-fall-south-american-empire