I saw that upthread, in 2016 I posted about an old GH game that had slavery as a theme, and connected that to an African-flavoured Hepmonaland.How often does slavery come up in your games?
Abolitionism was a theme in that game. Unsurprisingly, the PC whose family was descended from Hepmonaland, and who had been born into slavery, was a leader of that movement.