Gregorio Garcia, Origen de los indios del Nuevo Mundo (1607)

A Dominican who had lived nine years in Peru and afterwards in New Spain took one question — where the peoples of the Americas came from — and answered it by a method rather than a thesis. He collected every opinion he could find, argued each in the voice of its own author, printed the objections against it, and for a long time refused to give a verdict of his own. Pressed by learned readers, he gave one that no single-origin theory allowed: many nations, many routes, many arrivals, many times.