The New World Order (NWO) is a term used in several conspiracy theories which hypothesize a secretly emerging totalitarian world government. The common theme in conspiracy theories about a New World Order is that a secretive power elite with a globalist agenda is conspiring to eventually achieve world domination and rule the world through an authoritarian one-world government—which will replace sovereign nation-states—and an all-encompassing propaganda whose ideology hails the establishment of the New World Order as the culmination of history's progress. Many influential historical and contemporary figures have therefore been alleged to be part of a cabal that operates through many front organizations to orchestrate significant political and financial events, ranging from causing systemic crises to pushing through controversial policies, at both national and international levels, as steps in an ongoing plot to achieve world domination.

World domination is a hypothetical power structure, either achieved or aspired to, in which a single political authority holds the power over all or virtually all the inhabitants of Earth. Various individuals or regimes have tried to achieve this goal throughout history, without ever attaining it. The theme has been often used in works of fiction, particularly in political fiction, as well as in conspiracy theories, particularly those fearing the development of a "New World Order" involving a world government of a totalitarian nature.