How many Star Trek fans remember the episode with two guys from same galaxy at constant war with each other but looked identical? (Images Wikipedia & my dog Mae)

Capt. Kirk:  Why are you at war… you are the same.

The two men spoke at once, indignant….

Can’t you see?  Are you blind??  I’m Black on the Right Side and White on the Left side.

And   HE… is White on the Right Side and Black on the Left side

How much time does it take to evolve?  Apparently, eons, if ever…

We must LOVE ONE ANOTHER