And US military intervention, economic sanctions, etc. in Venezuela and Cuba aren't to blame at all, I guess?
The US has spent trillions of dollars over the years trying to convince everyone that socialism can't work by making sure it doesn't work. It seems absolutely unscientific to ignore that.
In any case, I am not asking about the abolition of private property, just about government-mandated charity at scale. Let's say you get a marginal tax of 100% on salaries over $200K, and on wealth over $10M. That's more private property than most Americans will ever have in their life. Is tbat proven to fail? Where and how?