In our society, there seems a general rule that, the more obviously one's work benefits other people, the less one is likely to be paid for it. - David Graeber

The reason that economic textbooks now begin with imaginary villages is because it has been impossible to talk about real ones. Even some economists have been forced to admit that Smith's Land of Barter doesn't really exist. The question is why the myth is perpetuated anyway.

We no longer like to think about bureaucracy, yet it informs every aspect of out existence. It’s as if as a planetary civilization, we have decided to clap out hands over our ears and start humming whenever the topic comes up.

Exchange is all about equivalence.