In 1858, people believed in "permanent invariability of species," i.e. species never vary far from the norm.
In cohort with Charlie, Alfred Wallace observed three damning truths:
- Animal populations are kept in check by lack of food and predation.
- Species population size results from food-finding and murder-avoiding.
- Species variants better at food-finding and murder-avoiding reproduce.
Final blow: in natural disasters (or similar survival threats), superior variants outlive the norm. Through repeated survival threats, species continue to vary.
Mutations cause weaker species as well. They simply perish with the normies.
When species are intelligent and consciously notice evolution of a superior species, they (rightfully) feel threatened.
Many, if not all, superhero worlds explore this problem.
In the first, X-Men are explicitly known to have superior genetic mutations to homo sapiens. Superpowers range from pathetically weak e.g. Bailey Hoskins, the boy who explodes and unreasonably powerful e.g. Jean Grey who can read minds, use her mind to tear atoms apart, bend time, and oh yeah, never die. Surviving catastrophe is her strong suit.
Governments fear mutants like her and try to control or eliminate them. These efforts are easily thwarted militarily with direct force and psychologically by manipulation a.k.a. heroism.
That said, even Jean Grey is beatable under good circumstances. Evolution is not about optimal survival everywhere, just 'most likely to survive in this particular environment'. So forget elitism and accentuate your unique mutations. You're more likely to survive that way.