 The picture that emerges is one of a complexly scalable social system that expands through reproduction, kinship alliances, and fissions, and overcomes internal conflicts and those with neighbors along routes of migration.These networks constitute a generative demographic engine for health, a potential for large sibling groups, and for extensive cooperation within and between these groups constructed through reciprocal ties of marriage.The book is lavishly illustrated with photos, network diagrams, and analytical tables showing how very simple principles of cohesion and scalable alliances between families are able to organize this social system through a series of shifting articulations at a variety of social and spatial levels.