Or hitler killing like 6 million unarmed Jews, or the other slave trades that lasted far longer, or the terrible human experiments Japan did to people during ww2, or when hundreds of black people were blocked from having their syphilis cured for 50 years because scientists just wanted to see what happens, or the tons of times entire cities would be raped and pillaged and taken over with no male child left alive..... I mean, there's been so many atrocious acts done by humanity.... To actually vote and say this was the worst one is just tacky.