This is not original by me. I found it years ago. It's an excellent general summary.

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.

New Dealism: You have two cows. The government takes both, shoots one, buys milk from the other cow, then pours the milk down the drain.

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

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