Some civilizations have been fighting an endless transdimensional grudgematch to the point that successive inevitable dimensional collapses purge all the races that aren't hyper survivalist and also hyper advanced. The trisolarans are an example of a primitive civilization who's experiences have somewhat mirrored this extremely poisoned outlook.
To be fair to the TBP trilogy..
spoiler
Some civilizations have been fighting an endless transdimensional grudgematch to the point that successive inevitable dimensional collapses purge all the races that aren't hyper survivalist and also hyper advanced. The trisolarans are an example of a primitive civilization who's experiences have somewhat mirrored this extremely poisoned outlook.