Chrisjen Avasarala takes her position as Deputy Under-Secretary of the U.N. Judging by the approximate ages of each character, the Rocinante crew are born between 23. Realizing that, despite the differences between Earth and Mars, both planets are taking advantage of the system's asteroid colonies, the Outer Planets Alliance (OPA) is formed to represent and fight for inhabitants of the Belt that lies between the orbits of Mars and Jupiter. Over the next 75 years or so, both Earth and Mars use the Epstein drive to colonize other areas of the Sol system, inhabiting asteroids such as Ceres and Eros, as well as moons like Ganymede and Phoebe. The two planets share this technology, and an independence deal is reached as a result, leading to the formation of the Mars Congressional Republic and establishing The Expanse's two main factions. In the early 23rd century, Solomon Epstein accidentally invents the Epstein drive, allowing for unprecedented travel throughout the solar system and far quicker trips between Earth and Mars. Having developed far enough to become a self-sustaining planet and with generations emerging that harbor no connection to mankind's home world, Mars begins to seek independence from Earth, believing that the relationship is no longer serving their best interests. Related: Expanse Showrunner Explains How The Show Will Be Better On Amazonīy 2150, the Martian population is thriving thanks to increased immigration from Earth and has a population of over 100 million. Colonization of the Moon begins shortly after Mars, Earth completely depletes its fossil fuels, asteroid mining begins in space and a cure for cancer is discovered. Several other events occur during this period. By the mid-22nd century, these continental bodies sign over to the UN, who act as the chief leaders of Earth. enters into a joint economic system with Canada. The EU becomes the dominant force within Europe (with Britain presumably still arguing over Brexit), an African Union takes charge of Africa and the U.S.

In The Expanse, Earth is ruled by the United Nations, but this shift didn't occur overnight. Secondly, the Earth's governance begins to slowly amalgamate.

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