I want to create a giant war, called the 10,000 War. This war becomes so big entire civilizations get wiped out, and no one can stop it, though everyone wants to. The war cumulated to become bigger and bigger, and no one in this part of the galaxy is safe (Yes this means it is not just on Earth). It is basically like the Norse Mythology event Ragnarok, where it really resets everything. There are a lot of survivors of this war, unlike Ragnarok.
This part of the galaxy (the furthest extents of the settlements of about 100 lightyears away from Earth) is filled with mostly humans, and some aliens that look like humans. Earth is the central planet, and other planets are reached by permanent wormholes. There are a few different empires, but they mostly only own planets that have little on them. The vehicles work like Quin-Jets from the MCU, except they work a lot better in space. This is the same across the entire universe. None of the planets are insane, or pure evil. They function like the world today, except there is less peace, and there is nothing like the United Nations for the planets. Certain planets, including Earth, have different countries and stuff like the United Nations.
The final effect of this war is that pretty much every planet is either destroyed and unhabitable, or at least so crippled that they can no longer fight or protect themselves. Many, many people would be dead, and the governments are really weak. People are starving, and communication between planets is nearly impossible.
What kind of event would have to happen to cause such a massive war? What would cause everyone to get involved, and what could stop the war from ending?
- Starts simple
- No evil robots, or anything that has to do with a weapon that went out-of-control
- It can't have to do with Mutually Assured Destruction.
- No one can be out of the war
(Edit: I clarified the question because its on hold)