I mean it's Marx ffs. You don't have to have read his stuff to understand he was probably not keen on the idea of people being forced to work for free.
"Labour in the white skin can never free itself as long as labour in the black skin is branded"
Apparently, some wee vegetarian guy with a funny moustache started a massive war which killed lots of innocent people. I don't know his name though as the snowflake left won't let us have a statue of him.