Communism: a theory or system of social organization in which all property is owned by the community and each person contributes and receives according to their ability and needs. Imperialism: a policy of extending a country's power and influence through colonization, use of military force, or other means. Patriotism: the quality of being patriotic; devotion to and vigorous support for one's country. Chauvinism: exaggerated or aggressive patriotism.