Sure, and you could argue that we haven’t actually tried communism, or that US democracy is so gerrymandered and neutered (eg Citizens United), etc about any political system. I don’t think we’d be where we are in the US if we had a “pure” democracy, I don’t think Russia would be where it is if they had actually gotten to communism. South America might be a much different place if the US hadn’t looked at the budding socialist movements and said “no way, buddy”.