Socialism: You have two cows. The government takes one and gives it to your neighbour.

Communism: You have two cows. You give them to the government, and the government then gives you some milk.

Fascism: You have two cows. You give them to the government, and the government then sells you some milk.

Nazism: You have two cows. The government takes both and shoots you.

Capitalism: You have two cows. You sell one and buy a bull.