" Indeed, I once did a little exercise: I took about half a dozen economics books, the big fat ones like Samuelson’s, and so on, and looked up in the index: do the words “energy,” “entropy,” or “thermodynamics” ever occur? Not once in any of them. Energy! You can’t even have a f——king dream at night without energy.

[Quoting physicist Geoffrey West.] "

― , Complexity Economics: Proceedings of the Santa Fe Institute's 2019 Fall Symposium