Glossary
Oblivion
The fate of everyone in the Tangent Universe if it collapses: erasure along with the universe itself.
"The Manipulated Living will do anything to save themselves from Oblivion." Oblivion is why the Manipulated act as they do, even though they do not know it. It is also what Donnie prevents: when he returns the Artifact, the Tangent Universe and everyone's memory of it is wiped, but the people themselves survive in the Primary Universe.
Defined in The Philosophy of Time Travel