"History is a continuum, it's not these separate moments. That's how we look at it. In the 1700s in Virginia before there were police officers - there were these groups of men who would wander the countryside - and if they saw a black man or a black woman they would presume that that black man or woman was a slave. If you didn't have the kind of pass that you were supposed to have, then you could be whipped, you could be enslaved, you could be taken into custody - even if you were free. And as I'm reading this I find myself thinking, "How is this any different from stop-and-frisk?""