SummaryThe problem of converting the Amerindian world to Catholicism was given a radically new solution, both at a theoretical and a missionary level, by the Jesuit Acosta: since American societies were of a completely different nature to Mediterranean ones, the preaching of the Gospel, too, had to be different from the classical approach. He gave a new definition to both preaching and American societies, especially the latter's religion and social organisation. Acosta's approach to American sauvagerie was pioneering; he conceptualised ideas (...) that had never been thought of before. There existed societies which were neither barbarous nor political (like the empires of Incan Peru and Aztec Mexico), which nonetheless had social organisation. With regard to their religious life, Acosta maintained that cult and belief without faith was not a sign of atheism, but of an early form of religion. These two reassessments gave rise to a new image of the savage society, which attained enormous success, even outside the missionary world. Fitting the theological structure into the secularised theories of radical enlightenment, both Locke and Hume had recourse to the ethnologic aspects which Acosta had set out. (shrink)