Is Slavery a Good Economic Model?

Sylvia: I'm always a little bit more conflicted about whether or not slavery was profitable for the societies that engaged in it. It's one of the things that kind of complicates matters is it can be a little bit tricky to assess, particularly when you're trying to use a metric from the nineteenth century. Ah, so get time for one more question, an then i can get, got to get you into the enlightening round. Oh, sure. So, sort of final thoughts. He has this final argument that i felt very confused, where he basically says that its sort of aversion of the slavery, is not a good economic model, it doesn't actually make societies richer