The End of All Things is a science fiction novel by American writer John Scalzi, the sixth book set in the Old Man's War universe.

Daquin, taken hostage by the Rraey while the rest of the crew is left to die, is subjected to a procedure that leaves him disembodied as a "brain in a box", with no option but to do the bidding of his as-yet-unknown captor.

In the second novella, General Tarsem Gau and his assistant Hafte Sorvalh (narrator) deal with political crises in the Conclave that arise from the disclosure of Ocampo's records of the Colonial Union over several years.

At the end, a letter from the General to Sorvalh reveals that he initiated his own assassination in order to ultimately strengthen the Conclave through a political upheaval that he knew would result.

In the fourth novella, narrated by Lieutenant Harry Wilson, Earth, the Colonial Union, and the Conclave are forced into acting together to prevent the destruction of all three entities by the clandestine disruptions of the Equilibrium.