There is a school of thought which states that humans were a sort of cancer on Terra. A parasite that raped and ruined every inch of the world until the skies were stained black, the water ran salty and poisonous, and the soil rejected seed.

When 80% of the population of Terra Firma took to the skies and into the inky blackness, they were in search of new Earths. Their home planet ravaged by greed or overpopulation, the ships made their slow way into new galaxies. They left behind dry Mars and the poisonous Venus, the many icy moons and gas planets that made up their own solar system, into the other spiral arm of the Milky Way, and onward into new frontiers.

The 20% of humans left on Terra had remained because they could not survive or were too stubborn to leave. They eventually died.

When the sons of the sons of the sons who left Earth found habitable planets, the original groups had dwindled. Many of the colony ships had been destroyed by asteroids or by human error. The gene pool had been thinned, nature took its course. Many groups fizzled and found themselves on verge of extinction, for they were too proud to marry between race.

The colony ships split away from each other around 2347 Earth Reckoning. Three main groups found three main solar systems on their own, each with humanly habitable planets and moons.

By 2400, each chosen planet had either succeeded or failed.

There were several. Billions of people had made the initial escape of Terra. The colony ships were made for expanding populations. People continued to breed and numbers were surprisingly high as they found themselves terraforming the planets and moons they found.

In the Icarus Spiral Galaxy there were five successful planets and three failures. In the Fenrir Ring there were eight successes, but nine failures. The Tianjin Elliptical was the most successful galaxy, with ten successful planets and only a single failure.

Life continued for Homo Sapien Sapien.