Men have newer brain software than women because all women have mated and uncooperative men got purged over and over again throughout the last 10k years. Men were selected for ability to cooperate; women still have sexual attraction triggers based on our species' earlier state.
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Replying to @CovfefeAnon @eigenrobot
Sexual dimorphism evolves a lot slower than monomorphic traits—for this story to work, you need to posit both a counterbalancing selection pressure making cooperativeness maladaptive in women, and much more time than 10K years http://www.gnxp.com/MT2/archives/003689.html …
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Replying to @zackmdavis @eigenrobot
You absolutely do not - women are mostly *unchanged*. What you see is the result of massive selective pressure in men and yes, you do see massive selective pressure of frequent total replacement of entire male lines - far over the minimum strength of selection needed.
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Replying to @CovfefeAnon @eigenrobot
I'm claiming you need a counterbalancing selection pressure in order for the women to be mostly unchanged. By default, alleles boosting cooperativeness will have the same effect in both sexes: "do this if male" genetic code is more complicated than "do this"
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Replying to @zackmdavis @eigenrobot
The behavioral landscape for men and women is radically different so that even if you gave women more "cooperation/fairness" genes they wouldn't express as anything that looks like cooperation or fairness. Pre-dating the filter you had near zero overlap in day to day behavior.
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The "if male, do this / if female, do that" was honed over the hundreds of thousands of years of specialized roles.
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Replying to @CovfefeAnon @eigenrobot
Huh? I agree that sexual dimorphism exists (honed over 100K+ years of roles), but I don't think you're addressing the technical argument that NEW dimorphisms are slow to evolve?
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In an environment where taller hunters do better, I expect selection for alleles that make both sexes taller, even though height is sexually dimorphic and even though women aren't doing any of the hunting. Do you disagree? Why would cooperation/fairness be different?
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Replying to @zackmdavis @eigenrobot
A tall woman still acts like and performs the role of a woman - no downside to it other than metabolic costs. Cooperation and fairness are *behavioral* which means they go through the behavioral filter - they get put in a context of what women do vs what men do 1/x
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"Fairness" drive in men is around hunting and war parties - it involves treating people differently. "Risk your neck, get rewarded" "Fairness" drive in women is around raising small children and dealing with each other - BAP's "longhouse culture" "Everyone gets the same" 2/x
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Same genes, different programs because of pre-existing differences. Same for cooperation. 3/x
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Cooperation for men involves actually cooperating to achieve a task since accomplishing tasks is actually important to disposable men. For women, "cooperation" means no one gets angry enough to cause a social fracture - they ruthlessly enforce "everyone be nice" 4/x
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Men being selected for "ability to cooperate" doesn't result in the same effects in women. The pre-existing split gets intensified b/c any mal-adaptive changes these genes are introducing into women's social behavior aren't getting weeded out. 5/x
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