The penetration of the Amazon region by the great religious movements of Europe and Africa began with the first phases of colonial domination, in the sixteenth and seventeenth centuries. The initial influence to be felt was Iberian Catholicism (the religion of the conquerors), which spread along the rivers as missions sprang up here and there. This period of missionary activity continued for over a century, bringing with it a host of consequences, most notably waves of epidemics that killed millions of natives. Nevertheless, an initial “syncretic alliance” was forged in the missions between shamanism and Catholicism.

From another quarter came legions of black slaves, exiled to the New World during the seventeenth and eighteenth centuries to replace the decimated native workforce; with them they brought their own religions and religious practices, which they transplanted, in a more or less transformed state, to all corners of the South American continent. The resulting Afro-American religions were practiced secretly by broad masses and in this way were fused with Amerindian religions (the case of pagelano in Brazil) and with “official” forms of Catholicism (tcmbanda and candomblé, among others).