Defensive and fortified settlements are often places of relatively dense nucleation by people with few viable alternatives, resulting in the imperative need to establish consensual rules for living together. What behaviours and attitudes were adopted in defensively nucleated places? Recent investigations at Ayawiri (Machu Llaqta), a densely settled hillfort town of the western Titicaca Basin of Peru inhabited c. ad 1300–1450, shed light on the nature of social life within the defensive community and the workings of social distinction, priority in settlement, conformity and publicity. I draw on the evidence from Ayawiri to discuss how defensive settlements create and reinforce certain ways of living by reformulating the basic logics of sociality and the material and spatial realms through which they work.