What was the lasting accomplishment of bartolome de las casas?

He changed the new Spain and the way Spanish pilgrims treated the Native Americans. Bartolomé de Las Casas put in 50 years of his life effectively battling subjection and the rough frontier manhandles of indigenous people groups, particularly by endeavoring to persuade the Spanish court to embrace a more altruistic arrangement of colonization. Also, despite the fact that he neglected to spare the indigenous people groups of the Western Indies, his endeavors brought about a few enhancements in the lawful status of the locals, and in an expanded frontier concentrate on the morals of expansionism.

Ibelieve the answer is 1756.