The Wari Empire thrived in the Peruvian Andes between AD 600 and 1000. This study of human skeletons reveals the biological and social impact of Wari imperialism on people's lives, particularly its effects on community organisation and frequency of violence of both ruling elites and subjects.

The Wari state was one of the first politically centralised civilisations in the New World that expanded dramatically as a product of its economic and military might. Tiffiny Tung reveals that Wari political and military elites promoted and valorised aggressive actions, such as the abduction of men, women, and children from foreign settlements. Captive men and children were sacrificed, dismembered, and transformed into trophy heads, while non-local women received different treatment relative to the men and children.

By inspecting bioarchaeological data from skeletons and ancient DNA, as well as archaeological data, Tung provides a better understanding of how the empire's practices affected human communities, particularly in terms of age/sex structure, mortuary treatment, use of violence, and ritual processes associated with power and bodies.