Patrick Ryan Williams

Patrick Ryan Williams is a School Director and Professor at Arizona State University's School of Human Evolution and Social Change. His research focuses on Andean civilizations, particularly the Wari and Tiwanaku empires, examining imperial dynamics through material culture, ceramic production, obsidian exchange networks, and geochemical analysis. He leads archaeological projects in Peru, investigating colonial settlements like Cerro Baúl, agricultural systems, and the socio-political impacts of environmental changes.

Williams employs advanced analytical techniques such as LA-ICP-MS and P-XRF to trace material origins and technological practices. His work bridges archaeology with chemistry, addressing questions of imperial expansion, ritual practices (e.g., beer production and sacrificial rituals), and the interplay between environment and human adaptation. He has conducted extensive fieldwork in Moquegua Valley and the Cuzco region, analyzing obsidian sourcing, ceramic production, and landscape transformations.

His research emphasizes the role of material culture in understanding state formation, including studies on Tiwanaku-Wari frontier interactions, Inca clay procurement strategies, and the technological innovations of pre-Columbian societies. Beyond archaeology, he has contributed to planetary science through isotopic analysis of Martian meteorites.

• Key Projects: Cerro Baúl Brewery Analysis, Wari Road Networks, LA-ICP-MS Geochemical Studies
• Themes: Imperial Economies, Ritual Practices, Geochemical Provenance, Andean Urbanization