The series is set in the years 2307-2308 AD of the Gregorian calendar. During this time, fossil fuels became exhausted and the distribution of fuels became imbalanced. Humanity must rely on an array of solar power generation systems orbiting the Earth, and supported by three orbital elevators, each one pertaining to one of the three -major powers- on the planet.
The nations that rely on fuel have plunged into poverty. Many believed that solar energy threatened the -promised land of God-. The chaos lead to the formation of a private military organization, called Celestial Being, dedicated to eradicating war and uniting humanity with the use of four humanoid machines called Gundams.