Overconfidence effect

Biological Parallel

Winner-take-all mating systems select for overconfidence because the variance in reproductive payoff is enormous. Male elephant seals challenge beachmasters despite most failing — the few who win sire hundreds of offspring. Young male lions challenge prides at brutal odds because exclusive reproductive access awaits winners. Peacocks grow tails beyond what their condition warrants because oversized displays attract more mates until they prove fatal. Satin bowerbirds over-invest in bower construction years before they can realistically attract mates. Natural selection does not optimize for calibration — it optimizes for participation in high-variance competitions.