Theory behind the power of Neo Humans.

I would say The Neo Humans are comparable to that of Humanity of Super Earth & Warhammer 40k (Philosiphy wise). They might have been normal humans before, but they left their ego behind which is what made every one of them unique in their own way and decided to let go of their emotions too to gain access to powers unrestricted. They use their advantage known to humans which is numbers, but more effectivley as they operate like an organized unit with each their unified purpose. They don't argue to do what normal humans do which broke their limiter and can do a lot more than what normal standards offer. Which would explain how they evolved and can continue to evolve.