Well written/acted, it is a more realistic sci-fi show (there is only thrust "gravity" or centrifugal rotation "gravity", messages travel at the speed of light so there is a delay deeper in the solar system...basically it obeys the laws of physics), it is also a political thriller/drama: Earth is run by the UN and is super overpopulated, but still the main power. Mars won its independence from Earth long ago, but is a technologically advanced military power and a direct rival power to Earth. They have lower numbers, but they make up for it in tech (advanced ships and weapons, power armor, etc). The Belters are basically the people who live in the Asteroid Belt and outer planet moons. Earth and Mars basically consume the resources of the belt/outer planets and Belters are basically a lower class who get shit on by both powers (which the Belters refer to as "Inners") and essentially serve as vassal states to Mars or Earth. Because of the differences in Earth, Mars, and the Belt, there is a lot of tension between all 3...especially with resources being consumed at a fast rate and leaving less for the little guys.