my favourite part of the Evolutionary Biology courses I took at the University of Toronto was learning that several bird species have 3+ sexes? the ruff bird is a great example - each male variant has a different (and successful!) reproductive strategy, and a different chromosomal sequence.

unlike the ruff bird, human sex falls into a bimodal distribution - this means there are two strong peaks (”typical” male and female morphs), with a whole lot in between.

evolution is nice way of saying “statistics played out longterm among living organisms”, and evolutionarily successful traits….aren’t something to hold up as natural or moral, or representative of an advanced state. it’s literally just fuck tactics that make your group size increase.

(though fucking isn’t always the best route, as asexual reproduction is massively advantageous as a short-term strategy, and certain species dominate the landscape by switching between sexual/asexual depending on environmental conditions)

besides all that, the strength of humankind has always been our ability to work together communally, and that’s straight science. so even if you went down the extremely problematic path of valuing fellow humans based on their potential evolutionary contribution (coughs, eugenics, coughs), there would still be zero scientific basis behind discriminating against trans, non-binary and intersex people.

tl;dr here’s a challenge to all the bigots out there: please stop using “science” as a defence when the actual science is (overwhelmingly) against you.