The common idea that humanity, as a race, lives alone in the universe is a very outdated belief because our planet has already been considered as an outpost to exchange raw materials and biological resources by many alien beings, this project has been made to store supplies for those races that come from other parts of this galaxy. Civilized races that inhabit in this region of the galaxy have found a way to be organized and be diplomatic with each other, therefore, in order to avoid any galactic war or unnecessary destruction of planets and resources, they have structured themselves in world corporations and hierarchies that jointly explore and coordinate the mining of colonized worlds, they have developed ways to trade with other collective corporations or federations.
There are also hostile races that consider themselves superior to the rest and they battle for the conquest of other planets, these aliens work as galactic empires, and take control of many worlds based on military oppression and have established a totalitarian way of government.
In an ancient time, a skirmish happened in this part of this galaxy and one group of entities from this empire fought in space and took possession of planet Earth, they now see themselves as the owners of this planet, which is also considered as if it were a real estate prize very valuable.