The Unification movement is the name of an underground group that exists within the Romulan Star Empire.

The Unification movement consists of Romulans who are against the militaristic nature of the empire and wish for a re-unification with their Vulcan cousins. The movement is a powerful force but one that is surpressed by the Romulan authorities.

The group is a charismatic force within Romulan society which is led by Ambassador Spock and is one of the many factions that are competing for power after the collapse of the Romulan Senate during Shinzon's coup.

(Titan novel: Taking Wing)