There's a difference, now, though:

Humankind's doing its "mitosis" thing.

Humankind is dividing-by-alignment.

That only happens 1x per world, ttbomk.

( after the original Industrial Revolution, the Roman Empire, then the "seedling" that that was, in our world eventually grew into a "sapling", the official Industrial Revolutions-sequence..

then, as population reaches ecological-saturation & technology simultaneously reaches world-breaking power, ClimatePunctuation kicks-in..

etc

all eventually enforce The Great Filter.

& in that Great Filter, alignment polarizes.

Anti-Life polarization & With-Life polarization.

Every world of people-similar-to-our-kind would have to go through it, same as "puberty", but for whole-species )

As the process progresses, the polarization is going to become more & more extreme.

So, until now we've been mixtures, every individual ( with few exceptions ), but .. that's going to be changing, until there's zero mixture left, & everybody ( near the end of this century ) is absolutely-polarized, 1 way or the other.

_ /\ _