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There's some good work done on this. The person who did it, Helen Fisher, originally set out to learn why people fall in love with those they do. But, what I took from her work is far more interesting. She put people through brain scans, and had them take personality tests. She found there are 4 main determinants of personality, estrogen, testosterone, dopamine, serotonin. These shape the brain before a person is born. These make a person's personality. She said that everyone's brain was shaped by and uses these chemicals, but that everyone is unique. Some people have personality traits and appearance more associated with say estrogen than testosterone. One of these is easy to see I different people. People with brains shaped more by estrogen have a more slanted than upright forehead. Look at people on TV, they're expressive types, men and women, which is typical of the personality of a person whose brain was shaped more by estrogen than testosterone.

Look at other people, those with tall foreheads, they tend to be more quiet, blunt, analytical and such.

Anyway, Helen Fisher said that more men have a more testosterone shaped brain and personality traits and more women have a more estrogen shaped brain and personality traits, I don't know if she's correct though. Lotta male people on TV with the expressive personality.

She carefully emphasized that this is strictly about personality and not about character. My addition is that other factors might shape personality after birth.

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Interesting. I don't (yet) know her work. I see she recently passed away. After the current big project is complete, I'll try to turn to her stuff. Thanks!

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Gender in the sense you are constructing is unnecessary, redundant. Sex is biological. How one lives their life, their attitudes, dress, speech patterns, preferences, desires, passions, interests used to be defined by gender stereotypes with little allowance for living outside the socially constructed boundaries. Instead of inventing something called gender which is distinct from sex, we can just simply relax these boundaries, which we have been doing. No need for extra layers. There, fixed it.

Also, I think your classification that the right thinks everything is biology and the left thinks it’s a mix of both nature and nurture is backwards. In my experience the left has been far more skeptical of biology than the right has been of environment. Steven Pinker in his book Blank Slate draws this out pretty clearly. Or perhaps I am ignoring the far right crazies who I discount entirely, who may actually believe in 100% biology.

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Sure, it's reasonable enough, pro tanto, but it'd be good to see the more difficult questions, such as trans women participating in female sports or gaining admission to women only spaces, being addressed.

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