Earth has a population of roughly a billion hominids. For the most part, they are happy with their lot, living in a preserve at the bottom of a gravity well. Those who are unhappy have emigrated, joining one or another of the swarming densethinker clades that fog the inner solar system with a dust of molecular machinery so thick that it obscures the sun.
The splintery metaconsciousness of the solar-system has largely sworn off its pre-post-human cousins dirtside, but its minds sometimes wander…and when that happens, it casually spams Earth’s networks with plans for cataclysmically disruptive technologies that emulsify whole industries, cultures, and spiritual systems. A sane species would ignore these get-evolved-quick schemes, but there’s always someone who’ll take a bite from the forbidden apple.