The Dark Universe Trilogy

Taking place Trillions of years in the future, the characters live among the ruins of a Super Galactic Civilization long extinct.  The heat death of the universe is well underway, all naturally occurring stars have burned out, leaving the universe dark.  New life has ceased to be generated naturally and reproduction is seen as relatively pointless because every joule of energy is precious.

All energy usage is seen as hastening the end of the universe, therefore a sparse and conservative culture dominates the mainstream thought.  There are breakaway pockets of beings who organize together to create a few artificial stars, radiating heat and light at a massive rate but dwelling out their last days in the glory of the old ages of light.  These are generally viewed with disdain and exasperation by most, and by some fanatical factions as an unacceptable threat to the Universe.

As the end nears, what remains of the political structures crumble and the radicals gain control, launching an all out war against those still living in the light.  The last great war...in the Universe.