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> An eagle in the world of doves can kill a lot of doves and have short term evolutionary imbalance. But soon, the marginal cost of turning into an eagle is so small so there are new eagles popping up in the population all of a sudden.

This looks like a reference to the Hawk-Dove game. For those who haven't heard of it:

You have a population of two groups, hawks and doves. When they come into conflict (say, over a source of food), two doves will spend a lot of time staring each other down (each incurring a minor fitness penalty), and two hawks will fight (each incurring a major fitness penalty), but a dove facing a hawk will immediately surrender, incurring no penalty at all.

Depending on the amounts involved, there is a percentage of hawks which maximizes the total benefit enjoyed by the population, and that percentage is more than zero. A few hawks save a lot of doves time they could spend doing more productive things.

What I find interesting about this game is how it interacts with some popular notions of government. A traditional utilitarian perspective is that the purpose of government is to maximize the welfare of society. As applied to the hawk-dove game, that would mean the government should anoint some people "hawks" and set rules that mean a hawk in conflict with a dove automatically wins, regardless of the merits of the conflict. This is a pretty traditional aristocracy setup. It would then be the business of the government to make sure the number of nobles stayed within an appropriate margin relative to the number of commoners.

But another very popular model of the government says that it should make sure everything is fair. ("All men are equal before the law.") That would mean abolishing the concept of the nobility's inherent superiority to commoners, ensuring that everyone is a dove. It sounds better, but in terms of societal welfare, it's worse.

>It sounds better, but in terms of societal welfare, it's worse.

Within the very contrived confines of the hawk-dove model sure, but I highly doubt that the hawk-dove game is a particularly useful model for society as a whole.

Thanks for the additional insight, I learned about this type of strategy in "The Selfish Gene", by Richard Dawkins. Although, I personally don't think that the analogy alone can describe an incredibly complex structure such as the global society.

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