Excessive Self Regard Tendency
Humans think of themselves as better than they are, think of their possessions as more valuable than they are, and think of their decisions as better than they are.
There is a name in psychology for this overappraise-your-own-possessions phenomenon: the “endowment effect”. And all man’s decisions are suddenly regarded by him as better than would have been the case just before he made them.
Mans excessive self regard tendency also makes him prefer people like him.
This has perverse consequences.
Degrading cults / orgs - A dysfunctional group in charge of hiring degrades the entire organization - as they hire more people like themselves.
Irrational bets - I think I’m taller, faster, and stronger than you (even if I might not be)