"The profits derived from slavery are more extreme than I think are commonly acknowledged. As I said yesterday, in 1860, the combined worth of the 4 million enslaved black people in this country was some $3 billion, nearly $75 billion in today’s share of dollars. Cotton, in 1860, was this country’s largest export—not just its largest export, it was the majority of exports out of this country. So, from a financial perspective, just the economics of it, it’s absolutely impossible to imagine America without enslavement."