Well, they gave Europeans and the rest of the world Syphilis. So… they got that going for them…
And history would have been VERY different if the New World had HALF the domesticate-able animals the Old World had. Not only would they have had labor saving which would have advanced civilizations, but they would have had either better plague immunity, or had plagues to give the Europeans and the massive death toll due to disease would have not been one sided.
