In a way, they are. People haven't changed that much since then. However, economic models need spring into existence from the ground up. They are emergent. The

In a way, they are. People haven't changed that much since then. However, economic models need spring into existence from the ground up. They are emergent. The world is too complex for them to be designed by theorists. This is why base capitalism (not the complex beast it has become) works, as even without any pressure people start trading. USSR communism collapsed because it needs to be enforced from the top, and you can only keep up a lie for so long. The same is true for our current zombie-capitalism. We do need to give new systems some room to form and grow, though... and not label it as EVIL communism/capitalism/someotherism too soon, as that will cause typical path lock-in.