Unity of action or Unity in action may refer to:
Classical unities - A tripartite theory of dramatic tragedy originating from Italy in the 16th century, which includes "unity of action" Freedom of discussion, unity of action - A phrase originating from Vladimir Lenin, typically referring to democratic centralism. A common variant is also "unity in action." Platform for the Unity of Action - A former Catalan independentist and libertarian socialist party in Catalonia. Unity in Action Party - A minor political party in the United Kingdom. The Unity of Action Pact - A pact of coordination between Italian socialist and communist parties around the 1930s.