Total war is a military science fiction series that is inspired by authors like Robert Heinlein, Dan Simmons and Joe Haldeman. The story starts on Earth in the 2090’s and goes on from there. This series has 5+ books complete with partial polishing done as well as two further novels in progress that are set in the same setting.
The setting describes a world that has evolved from the world as we know it in the period from 2000-2030. In some cases events diverge even earlier, but things start changing compared to the reality we know in the present. A number of fundamental discoveries and technologies are instrumental in defining the setting. You can read about them here, but doing so means SPOILERS!