Tonka and Paco were fighting over the windows in the lego set.
Tonka wanted both. Paco wanted at least one.
I took one from Tonka and gave it to Paco (income redistribution).
Then, I told her.
"Look, there are a few ways to get the window from Paco.
- You can take it from him by force, but I won't allow that (system of laws enforced)
- You can ask him if he'll share it with you (charity and/or socialism)
- Or you can offer him a package of blocks that you have for which he will trade you."
She asked him to share. He said no.
She offered 1 block. He shook his head.
"Look, Tonka, it's a question of supply and demand and perceived value. There are plenty of blocks, but only 2 windows. You also place a very high value on having the window. Paco knows that. You're going to have to make a much better offer, give him some things he can really use (utility) and then see if he'll go for it."
Sure enough, she eventually put together a package that convinced him to part with the window.
Then, my budding merchants made three more trades.
A proud moment indeed.