Devereux describes the ways in which Spaniards conceived of these two theatres of imperial ambition as complementary parts of a whole. At precisely the moment that Spain was establishing its first colonies in the Caribbean, the Crown directed a series of Old World conquests that encompassed the Kingdom of Naples, Navarre, and a string of presidios along the coast of North Africa. Projected conquests in the eastern Mediterranean never took place, but the Crown seriously contemplated assaults on Egypt, Greece, Turkey, and Palestine. elucidates the relationship between the legal doctrines on which Spain based its expansionary claims in the Old World and the New. vastly expands our understanding of the ways in which Spaniards, at the dawn of the early modern era, thought about religious and ethnic difference, and how this informed political thought on just war and empire. While focusing on imperial projects in the Mediterranean, it simultaneously presents a novel contextual background for understanding the origins of European colonialism in the Americas.