Point of fact, there are no cultures or societies on the planet which have any reason to believe themselves more righteous in this sort of history than any other. Indigenous enslaved and oppressed other indigenous –even before the coming of those devilish Europeans. Ancients enslaved other ancients in the millions. Muslims perpetrated (and some still do) all the same sorts of evils on peoples they conquered and forced to assimilate or face all the usual sorts of consequences for not doing so.
Even today, with all the weight of our educational apparatus and cultural propaganda against bowing to “the absolute” and accepting our natural awe of the transcendent, the vast majority of humankind still adhere to what the sages of the ages have told us about the spiritual foundation of reality and the presence within it of mystery and things we are intended to seek, but from which we are estranged.