Nice theory, but it seems demonstrably untrue to me. Has China made any major strides in civil rights since their economic miracle? They seem as determined to stamp out the few remaining bastions of civil rights in their corner of the world as ever.

Democracy is a morally superior system of government, because it's fundamentally premised on a moral idea; that governments "derive their just powers from the consent of the governed". Dictatorships and aristocracies can make no such claim.