Slavery helped build America and most of Europe. Slavery has always existed in one form or another, so when African tribes sold off opposing tribes and warriors to claim more land, it meshed great with the needs and demands of quickly growing countries. However, as we've grown, we've also outgrown it. Besides for the moral debate, who could honestly afford to feed such a working family? They'd have to be educated, at least in whatever industry you're attempted to use them in. You can hire someone and essentially make them the same. There's just no need for slavery anymore. Hell, if you look at China, we're currently funding the slavery of their own people (hello technology products). *shrugs* It's just another part of history.