I remember my school economics textbook. Monetarism was literally one small footnote. And we were given an example of perfect capitalism, working perfectly on an island. It was divided into 6 producers, each with a roughly equal area of coast and hinterland, so that the rational laws of supply and demand could freely operate.
Fascinated as I am by hermetic utopias and ideologies, it was a thing of beauty. The rest of the book focused on the exceptions, which were everything.