2 Cows 

We don't know who wrote this, but... 

Socialism: You have 2 cows. Give one to your neighbor. 

Communism: You have 2 cows. Give both cows to the government, and they may give you some milk. 

Facism: You have 2 cows. You give all the milk to the government, and the government sells it. 

Nazism: You have 2 cows. The government shoots you and takes both cows.  

Anarchism: You have 2 cows. Keep both cows. Shoot the government agent and steal another cow. 

Capitalism: You have 2 cows. Sell one. Buy a bull.