A billion years ago, the Celestial Group planted the seed of the Celestial Tiamut on Earth and dispatched Mutants to hunt down and clear away the planet's apex predators, removing obstacles to the growth of intelligent life.
However, the Mutants got carried away with the killing and became apex predators themselves—so the Celestial Group created the Eternals to deal with them.
Harry had always found the whole thing hilarious. It had the distinct feeling of setting up one secret police agency, then another.
Besides, the fiercest native predators on Earth were dinosaurs. Yet dinosaurs were not unbeatable. In fact, if they had survived to the present day, they would have had less impact on humanity than those tiny insects.
Honestly, if all mosquitoes were wiped out, Earth's population might have met the requirements for a Celestial's birth long ago.
Moreover, the Mutants' combat power as living creatures was outrageously strong. The Celestial Group would have been better off never deploying them. If their only goal was to accelerate population growth for a Celestial's birth, they could have simply thrown technology at humanity and controlled humans' reproduction.
In any case, there might have been other factors involved, but while carrying out her mission, the Eternals' leader, Ajak, began to develop some different ideas.
She began to feel that humanity was pretty good.
So she started guiding humanity's development—though honestly, Harry thought that was rather absurd. They had come to Earth a billion years ago and had secretly helped humanity, yet society's progress... had basically followed the normal course of history without interference.
Anyway, the closer the Emergence drew, the more Ajak wanted to stop it. Unlike her, another powerful Eternal, Ikaris, did not think that way. He intended to support the Celestial Group's plan.
The other Eternals were mostly unaware of