Okay, Marx was a smart guy but was also a dipshit loser that took a bunch of his primary sources on precolonial society from white supremacist settler colonialists with a fetishism for the "noble savage"

He arrived at correct conclusions because the model he was building was scientifically sound but a lot of the individual sources he used were western chauvinists at best.

Hell. he thought the people of eastern Europe and the imperial periphery were too backwards and reactionary to have a revolution before the more erudite and "enlightened" western proletariat.