Free Soil in the Atlantic World examines the principle that slaves who crossed particular territorial frontiers- from European medieval cities to the Atlantic nation states of the nineteenth century- achieved their freedom. Based upon legislation and judicial cases, each essay considers the legal origins of Free Soil and the context in which it was invoked: medieval England, Toulouse and medieval France, early modern France and the Mediterranean, the Netherlands, eighteenth-century Portugal, nineteenth-century Angola, nineteenth-century Spain and Cuba, and the Brazilian-Paraguay...