Universal cooperators are vulnerable to defectors. Optimal strategy is to cooperate with cooperators and defect with defectors, but how do
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Replying to @HbdNrx
you know which is which? If cooperators can identify a group of other cooperators, their group will dominate others. This is ethnocentrism.
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Replying to @HbdNrx
In the real world, cooperation is more likely in some ethnic groups, and in general people tend to cooperate more with their own group
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Replying to @HbdNrx
than with outsiders. Progressives who deny this reality want to have universal cooperation, but they don't see how
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Of course, ethnocentric cooperation should itself be unstable beyond a certain scale--ie when groups of traitors split & take advantage.
2:03 PM - 3 Dec 2015
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