Foolestroupe, it was inevitable that people WOULD fight against slavery! ;-) I mean, hell, Spartacus did, didn't he? People have been fighting against slavery ever since it first began, and they will always fight against it...

People will always fight against any and all forms of institutionalized inequality, because the soul detests enforced inequality above all else.

They did experiments with monkeys, giving better rewards to some than to others for performing the same tasks. The ones who got the poorer rewards got mad, went on strike, and wouldn't do anything at all after awhile. They also got in fights with the better rewarded monkeys.

Same principle. The monkeys did not like enforced inequality. They recognized that it was "not fair".

It is inevitable that such unfair systems will meet resistance, and the resistance will eventually change or end the system.