Mass Black slavery overturned earlier casual Iberian racial structures

Evidence

There is, however, much more to be understood of their presence in Mexico and the Spanish colonies of the Indies and South America than their mere numbers. The systematic transportation of Black labor to the New World had not always been an obvious or requisite step. For a few decades, as we have seen, it had not seemed necessary at all. When it did begin, it almost completely overturned the more casual application of Iberian racial structures that had already been transferred to the colonies. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 635