This is a good video if you have a spare 25 minutes.
It's by Carl Benjamin aka Sargon, that's the guy who did the rape joke about Jess Phillips. So I fully expect some to totally dismiss it with phrases like "I don't listen to bigots" And that's perfectly fine, everyone is free to be ignorant if they wish to be. I ain't forcing you to watch.
He does this video in response to something Frankie Boyle wrote, slagging of Britain (Dezzy esque). So he spends the first couple of minutes of the video talking about Frankie Boyle. After that he gives a fantastic take on slavery and the slave trade.
Worth a watch, I recommend it.
To quote him at the end of this video, speaking directly to Frankie Boyle. "Frankie, you live in a World without slavery because of Britain"
You can watch this a different way. There's many YouTube vloggers that have done reaction videos to this Carl Benjamin video. So you can watch it along with them and see their take on it too.
Here are some Americans reacting to it, watch along with them if you find that way more interesting.