Earth

History
Earth historically, had been the beacon of hope and sanctity among the universe, due to its "perfect" conditions for life, despite the low amount of resources in comparison for other planets. In Universe 7-A however, a grand hero in the form of a Saiyan never arrived on Earth -- and opted to stay behind to serve Lord Cooler.

Over time, the advance of the Planet Trade Organization took the galaxy by storm, and without any resistance, Earth became another planet under the umbrella of the PTO. When it became evident that Earth is sort of a "hub" within the PTO's boundaries, a secondary capital was established, and many important figures including Lord Cooler himself had relocated to Earth.

Despite the firm grip on the planet, Earth has a building underground resistance movement, but without proper strong forces, will be easily crushed in due time.

Demographics
Earth, much like any other planet in the PTO, had much of its population killed over time, while the rest remained as slaves. This caused the planet's population to drop from approximately two billion to below one hundred thousand within a matter of several years. Much of the current population consists of Earthlings, with some migrating from other territories in the PTO to include various alien species.

Government
Before Earth had been conquered, it was under a monarchy, with the planet divided into several sections, each with its own regional capital.