It's not economics because none of the theories have never happened? Really?
Karl Marks' theories have never happened?
Nope mostly not. When should I expect to see the concept of the state withering away? When is the workers uprising likely to take place?
Socialism is a failed concept because none of it could ever actually be implemented.
Redistribution can obviously be improved and needs to be improved but it won't be under a socialist regime. It merely helps bring everyone down to the level we need to elevate people out of.
