Sorry if that point was hazy. I'm in agreement with your comment but those implementations of national economies operating on Marxist principles were stifled gr

Sorry if that point was hazy. I'm in agreement with your comment but those implementations of national economies operating on Marxist principles were stifled greatly. WW2 caused much greater destruction of the USSR than the US. The US' anti-communist military actions, and economic blockades all existed because of a belief that allowing any communism ultimately leads its spreading everywhere. A rephrasing would be: We don't know for sure that a Marxist type system does not work because we have so few examples. Maybe we just haven't tried enough variations to find a version that compiles cleanly.