Hunter-gatherer aggregations writ large: Economy, interaction, and ritual in the final days of the Tuniit (Late Dorset) culture

•Variability in and significance of hunter-gatherer aggregation sites are reviewed.•The Cadfael archaeological site is a Dorset aggregation in the Canadian Arctic.•The aggregation site contains stone longhouses as well as ritual features.•Change over time at the site results from interaction between Dorset and Inuit. Most hunter-gatherer lifeways revolve around periodic large gatherings – aggregations – that serve as social, ritual, and economic anchors for their annual cycles. However, in archaeological contexts they are often difficult to recognize. This paper describes and interprets a particularly large and well-preserved example of a warm season aggregation site dating to the Late Dorset period in the eastern North American Arctic. This site extends for over 750 m along coastal beach ridges and contains four boulder-outlined “longhouses” of up to 38 m in length as well as hundreds of other features used for storage, cooking, and ritual activities. In addition to interpreting the range of activities occurring on the site, this paper discusses the clear evidence for change over time in the ways its inhabitants interacted with the built environment, and with each other. Because these changes took place mainly during the 13th century CE, they likely represent a reaction to the arrival in this region of ancestral Inuit, who migrated from Alaska during this period and ultimately replaced Dorset populations.