The binary nature of sex: a column by Deborah Soh

Why Evolution Is True

I’ve maintained in several posts that biological sex is not an arbitrary social construct, but an objective phenomenon into which the vast majority of humans (and most animal species) fall into the clearly delineated categories of “male” and “female”. The frequency of exceptions for sex is about 1%, or less if you omit transgender individuals who are “male” and “female” defined by chromosome constitution, genitalia, and form of gametes. Sex is largely bimodal, with most individuals falling into the two sharp “male” and “female” peaks and a deep valley of exceptional individuals between the peaks. For most purposes, we can regard sex in humans as a biological binary.

Gender, on the hand, doesn’t divide so nearly if you see it as an individual’s self-identification. Much of gender is, of course, biologically based, as when someone in a purely female body has a strong psychological (and hence biological) predilection to…

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About Jim Rose

Utopia - you are standing in it promotes a classical liberal view of the world and champion the mass flourishing of humanity through capitalism and the rule of law. The origin of the blog is explained in the first blog post at https://utopiayouarestandinginit.wordpress.com/2014/03/12/why-call-my-blog-utopia-you-are-standing-in-it/

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