Quote1 What do you think made you do it, fuzzball? To snap like that, and lead the destruction of the planet in an animalistic rage? Only to bring back all those you'd murdered and curse them to walk the Earth as scientifically engineered Zombies? Quote2
-- Spider-Man src

For unrevealed reasons, Beast got tired of humans' hate of mutants and destroyed much of humanity. Hank and his descendants would create the Wild Ones, the corpses of men turned into Zombies, as a way to punish them.

Sometime afterwards, a virus eliminated all mutants except Hank's unique mutation. This would allow Beasts to become the dominant species of the Earth.[1][1]

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