While these mainly focused on the relationship with Jews and Jewish conversos, other historians envisioned Iberian contribution to racism as the elaboration and distillation of Muslim proto-racism that gradually distinguished Africans from >whites< and that, even before the beginning of the Atlantic slave-trade, attributed different characteristics to the members of each cluster.
Source: wiktionary
Postmodernity, in Latin America in the I980s, had to do with modernity, from the sixteenth century onward: colonial domination, proto-racisms, the epistemic inferiorization of the non-Western world, the transatlantic capitalist/ mercantile order, and uneven development among other issues.
Source: wiktionary
Proto-racism is also identified in Roman views of subject peoples, the idea of collective natural slavery was intertwined with patterns of conquest, subjugation and governance.
Source: wiktionary
According to this perspective, these ideas already existed in the form of proto-racism and Shakespeare employs the medium of theatre to reinforce and disseminate them.
Source: wiktionary