"It has made all non-democratic forms of government illegitimate by waging wars of extermination against them"
Curious, then, how many Chinese and Russians there are yet. Is the US inefficient, or are you reaching a bit? And the US can be disgustingly good buddies with non-democratic governments: the Greek and Argentine juntas, various Middle Eastern states.
I'm not claiming the US wants certain peoples dead. I'm claiming that given any opportunity or excuse it went to war with states whose basal ideology was not of rule by the people unless they were American clients.