Evolutionarily Stable Strategy -Mental Model 085

When It Is Better To Have Daughters Than Sons 

A behavioural strategy which, if adopted by a population in a given environment, natural selection alone is sufficient to prevent alternate strategies from invading.


Example: Richard Dawkins said, “A well known example is the sex ratio, where any departure from the stable sex ratio is penalised by natural selection. If there are too many males, an individual is better off having daughters. And if there are too many females in the population, an individual is better off having sons. And so the stable ratio is 50-50. Or strictly speaking, it’s 50% economic investment in sons and 50% economic investment in daughters.”


Wisdom: “Extinction is the rule. Survival is the exception.” ― Carl Sagan


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