In 1550, he participated in the Valladolid debate; he argued against Juan Ginés de Sepúlveda who argued that they were less than human and required Spanish masters in order to become civilized.
He participated in the Valladolid debate. This was in 1550. He argued against Juan Ginés de Sepúlveda. They were less than human. This was what this Juan Ginés de Sepúlveda argued. He required Spanish masters. This was to become civilized.