Francisco Pizarro and his men captured Inca Emperor Atahualpa at the Battle of Cajamarca on November 16, 1532. However murderous and greedy Pizarro undoubtedly was, the Inca’s empire was as evil as the Soviet Union, so, well, some recognition is due.
Note: The illustration, above, is a detail of the cover of an ebook reprint of the classic treatment of Incan socialism.