The Neolithic in Britain was a period of fundamental change: human communities were transformed, collectively owning domesticated plants and animals, and inhabiting a richer world of material things: timber houses and halls, pottery vessels, polished flint and stone axes, and massive monuments of earth and stone. Equally important was the development of a suite of new social practices, and an emphasis on descent, continuity and inheritance. These innovations set in train social processes that culminated with the construction of Stonehenge, the most remarkable surviving structure from prehistoric Europe. The celebrated archaeologists launch their new book today at Hay.