RichM, I read the article and I take your point.

Granted, slavery still exists in the world, but it's nowhere near as prevalent as it once was. And it is not longer considered acceptable by the vast majority of the world's peoples. Even among those who practice it, they try to disguise it as something else.   Though it still exists here and there, you have to admit that things are immensely improved.

But—I think we're talking about a whole lot of things besides slavery here.

Don Firth