Except for, you know, white people... those guys suck.

Whether people want to believe it or weather they don't, inequalities, such as slavery, the subjugation of women, and even homosexual marriage issues, all stem from an innate desire for one group to claim more notoriety, respect, or societal worth than another "inferior" class. There is no justification for these things that doesn't truly stem for the desire of one group to claim "moral superiority."