The Great Mental Models, Volume 1

Disciplines, like nations, are a necessary evil that enable human beings of bounded rationality to simplify their goals and reduce their choices to calculable limits. But parochialism is everywhere, and the world badly needs international and interdisciplinary travelers to carry new knowledge from one enclave to another. —Herbert A. Simon[14]

Ego can be blinding when we optimize for short-term status protection over long-term happiness. This is the difference between being right and being effective.