> I'll just add that Marx lived in the mid-1800s, in Germany,

Worth noting that in his 20s he was exiled from Prussia at the request of the Russian monarchy (for his articles critical of them), lived in Paris from 1843-1845 until the Prussian Government got him expelled from France and had his radial German-language (but Paris-based) newspaper shut down. He lived in Brussels until 1848, when he was expelled on allegations that he had helped fund Belgian workers planning a revolution, and he bounced between a post-revolution France and Cologne, until he was kicked out of both, moving to London in 1849, aged 30, where he lived until his death.

Marx's most famous works (Das Kapital and The Communist Manifesto) were both written in London.