Flash Fiction #419/Gender (drabble)

 Four thousand years from now, a humanoid walks along a ridge, studying the ground for sign of past habitation. This One, gender not yet evolved, has a theory that humanity lived in a complex binary gender system for millennia before they evolved into true humans.  Others mock One for believing childish myths.

Impossible, Others say.  The ancestors held adequate intelligence to see multiple choices.  They would not voluntarily limit selves to such simplicity.  Therefore, Others reject all evidence.

And One cannot help but think that perhaps Others should examine their own voluntary limitations, and wonders, human-like, what will evolve next.