Feudalism: You have two cows. Your lord takes some of the milk.
Fascism: You have two cows. The government takes both, hires you to take care of them, and sells you the milk.
Real World Communism: You share two cows with your neighbors. You and your neighbors bicker about who has the most “ability” and who has the most “need”. Meanwhile, no one works, no one gets any milk, and the cows drop dead of starvation.
Capitalism: You don’t have any cows. The bank will not lend you money to buy cows, because you don’t have any cows to put up as collateral.