Earth (Hereafter)

Earth, also known as Gaia, is a planet in the Sol System. It is the fourth planet from Sol, and the only celestial body in the Sol System where Vegetation is viewable from Outer Space. It is one of only six naturally inhabited objects in the Sol System, with the other five being Enceladus, Titan, Venus, Pluto and Europa. Earth contains the only natural advanced civilization in the system, however, others have migrated over time.

Politics
Earth is a planet far from unification. Although many may think this makes it easier for an alien invasion, it does not. Two Extraterrestiral invasions have already been fought off, and more than 75 Mid-to-Large Scale Terrestrial Conflicts have occurred since 2000.