Everything

In ordinary conversation, everything usually refers only to the totality of things relevant to the subject matter.

However, the term "universe" may be used in slightly different contextual senses, denoting such concepts as the cosmos, the world, or nature.

Initially, the term was used with an ironic connotation to refer to various overgeneralized theories.

For example, a great-grandfather of Ijon Tichy—a character from a cycle of Stanisław Lem's science fiction stories of the 1960s—was known to work on the "General Theory of Everything".

In philosophy, a theory of everything or TOE is an ultimate, all-encompassing explanation of nature or reality.

[2][3][4] Adopting the term from physics, where the search for a theory of everything is ongoing, philosophers have discussed the viability of the concept and analyzed its properties and implications.