Chernobyl. I haven’t watched Roots yet, but I wouldn’t be surprised to see it on this list.
I mentioned in a previous thread that I’ve been somewhat disappointed in Gilded Age. There’s a lot of history they are glossing over. Been concentrating too much on the “pretty people in pretty clothing” angle. It could be so much more. Especially since the US has entered another gilded age — there are lessons to be taught/learned.