“You could argue that Marx and Engle never put their theory into practice either.”
So what, others did (my point), but (my point) no one even tried to put the orgnization or organizing principles of “Plato’s Republic” into practice, not Plato or anyone else.
You could argue Stalin and Moa, perhaps Jong Sum(the older dude who died in the 90’s) and Ho Chi Minh tried.