The theory of political religion concerns governmental ideologies whose cultural and political backing is so strong that they are said to attain power equivalent to those of a state religion, with which they often exhibit significant similarities in both theory and practice. In addition to basic forms of politics, like parliament and elections, it also holds an aspect of sacralization related to the institutions contained within the regime and also provides the inner measures traditionally considered to be religious territory, such as ethics, values, symbols, myths, rituals and for example a national liturgical calendar.
Political religious organizations, such as the Nazi Party, adhered to the idealization of cultural and political power over the country at large. The church body of the state no longer held control over the practices of religious identity. Because of this, Nazism was countered by many political and religious organizations as being a political religion, based on the dominance which the Nazi regime had (Gates and Steane). Political religions generally vie with existing traditional religions, and may try to replace or eradicate them. The term was given new attention by the political scientist Hans Maier.
Totalitarian societies are perhaps more prone to political religion, but various scholars have described features of political religion even in democracies, for instance American civil religion as described by Robert Bellah in 1967.
The term is sometimes treated as synonymous with civil religion, but although some scholars use the terms equivalently, others see a useful distinction, using "civil religion" as something weaker, which functions more as a socially unifying and essentially conservative force, whereas a political religion is radically transformational, even apocalyptic.
The term political religion is based on the observation that sometimes political ideologies or political systems display features more commonly associated with religion. Scholars who have studied these phenomena include William Connolly in political science, Christoph Deutschmann in sociology, Emilio Gentile in history, Oliver O'Donovan in theology and others in psychology. A political religion often occupies the same ethical, psychological and sociological space as a traditional religion, and as a result it often displaces or co-opts existing religious organizations and beliefs. The most central marker of a political religion involves the sacralization of politics, for example an overwhelming religious feeling when serving one's country, or the devotion towards the Founding Fathers of the United States. Although a political religion may co-opt existing religious structures or symbolism, it does not itself have any independent spiritual or theocratic elements - it is essentially secular, using religious motifs and methods for political purposes, if it does not reject religious faith outright. Typically, a political religion is considered to be secular, but more radical forms of it are also transcendental.