Although lowland Britain in 300 CE had been as Roman as any province in the empire, in the generations on either side of 400, urban life, the money economy, and the functioning state collapsed. Many of the most quotidian and fundamental elements of Roman-style material culture ceased to be manufactured. Skills related to iron and copper smelting, wooden board and plank making, stone quarrying, commercial butchery, horticulture, and tanning largely disappeared, as did the knowledge standing behind the production of wheel-thrown, kiln-fired pottery and building in stone. No other period in Britain''s prehistory or history witnessed the loss of so many classes of once-common skills and objects. While the reasons for this breakdown remain unclear, it is indisputable the collapse was foundational in the making of a new world we characterize as early medieval. The standard explanation for the emergence of the new-style material culture found in lowland Britain by the last quarter of the fi