Inhumans

The Inhumans were a now-extinct subspecies of Humans who ruled the planet Earth with a iron hand. They were genetically engineered with physical strength, agility, and intelligence far above that of normal humans and also the natural ability to use the power of the Living Force.

They also invented Force-drive starships and used them to colonize much of the Milky Way Galaxy beginning 29,650 years ago. They engaged in a war of genocide that saw the Inhumans kill off the Heralds of Galactus since the Inhumans viewed the Heralds' own use of Force-drive and Living Force powers as a serious threat.

Eventually, the encountered the Kree and the rising Kree Empire, with both sidss engaging in genocide in a war that last thousands of years. It was the Inhumans who initially decided to drive the Kree into extinction because the Inhumans viewed the Kree Empire's use of Hyperdrive and the religion of the Supreme Intelligence (including priests who had Living Force powers of their own) as a threat to Inhuman hegemony of the Milky Way Galaxy. The Kree's reaction was basically to counter the mortal threat of the Inhumans by fighting genocide with genocide.

When Earth was conquered by the Kree 15,600 years ago, the last of the Inhumans were killed off by the Kree.

Incidentally, the Inhumans mainly kept normal humans confined to the planet Earth and it's local solar system.