Isn't it interesting that even those who upheld slavery did not want to be slaves themselves? Even those who saw it as part of the 'natural order' of things dictated by God, didn't see it as something they wanted their children to experience directly?<quoted text>
So humanism is the basis of morality.
So when slavery was morally acceptable, by society, it was ok?
According to your argument, it would be.
No, this only shows the society to be hypocritical. Fairness is crucial to humanism: the same rules apply to everyone. Funny, even that principle goes back a long way.