The Lord of the Cringe

The world's population exceeded its limit during the Solar Era; about 35% of the humans have nowhere else to live.
Noah S. Ark has pronounced to rebel against his great-grandfather's legacy: he decided to flood the whole world with nuclear leftovers from the Pacific War of 2103. We done goofed.
No one survived.
Except some tadpoles chillin' by the pond.

Billions of fucking years of evolution to recreate a slightly different human species, alongside the residue that survived the Nuclear Suicide.
The new humans learned math, science, and twerkology from the remnants of their horrible past species.
They have yet to discover memes, oh boi.