That's a lot of propo. The only one I've read is the one on the top right. Absolute garbage. I recommend Lenin's "State and Revolution"
I'm not a communist. Just saying...
Discussion
Oh wait, no, I read the middle left one too.
I always feel the same way about Karl Marx: he identifies the problems very well but the solutions he proposes are inadequate and superficial.
They're also problems more for a less developed time. His reaction was probably appropriate back then.