New World Order (Novus Ordo Mundi) refers to a conspiracy theory in which a powerful and secretive group is claimed to be planning to eventually rule the world via an autonomous world government, which would replace sovereign states and other checks and balances in world power struggles.

In new world order conspiracy theories, many significant occurrences are caused by a powerful secret group. Historical and current events are seen as steps in an on-going plot to rule the world primarily through a combination of political finance and mind control.