According to gaming theory, any economic activity where both parties fully understand what is happening is a non-zero-sum game. We forget that a lot. We tend to think that buying and selling is a cut throat competition. Which it is if you’re not being honest with each other. But if you are, you both win when you buy or sell something. Think about that.
The key is being honest and transparent.
The Kingdom of Heaven is exactly that. A non-zero-sum game. There can be no tragedy of the commons here. There is no winners and losers. There is simply the body, and when one is exulted, all are exulted. And when one suffers, all suffer.
You can go directly to the sermon here.