Third Gender: A Short History
Social convention says there are two types of people: male and female. And you know whos who based on their genitalia. But in fact, various cultures have long recognized members who buck the biological binary. The ancients wrote of people who were neither men nor women; individuals have been swapping genders for centuries; and intellectuals have fiercely debated the connection between the body and the self. Today, there are many populations with alternative identities, such as hijras in South Asia, kathoeys in Thailand, and muxes in Mexico. Yet these groups havent had it easy, often facing discrimination and violence. Only recently has the fight for legal recognition and respect of "third gender" begun to bear fruit, thanks to pioneering activists and policymakers. The world, it seems, is slowly embracing an adage once restricted to liberal universities: Gender is a construct, and people should be able to define it for themselves.
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https://foreignpolicy.com/2014/06/30/third-gender-a-short-history/