To assume you can somehow escape ethnocentricity and that there is some objective position that stands outside your culture from which, “freely and rightly,” you can criticize other groups who are “trapped” in theirs is the moment of blindness from which grow all the abuses of the dominant, unmarked state when that particular state, whatever it is, obtains dominance—which, if it is culturally useful enough, it will.

­–“Escaping Ethnocentricity?” by Samuel R. Delany

Go read the whole thing.