Neo-fascism is a post-World War II far-right ideology that includes significant elements of fascism. Neo-fascism usually includes ultranationalism, racial supremacy, populism, authoritarianism, nativism, xenophobia, and anti-immigration sentiment, as well as opposition to liberal democracy, social democracy, parliamentarianism, liberalism, Marxism, neoliberalism, communism, and socialism. As with classical fascism, it proposes a Third Position as an alternative to market capitalism.
Allegations that a group is neo-fascist may be hotly contested, especially when the term is used as a political epithet. Some post–World War II regimes have been described as neo-fascist due to their authoritarian nature, and sometimes due to their fascination with and sympathy towards fascist ideology and rituals.
According to Jean-Yves Camus and Nicolas Lebourg, the neo-fascist ideology emerged in 1942, after Nazi Germany invaded the USSR and decided to reorient its propaganda on a Europeanist ground. Europe then became both the myth and the utopia of the neo-fascists, who abandoned previous theories of racial inequalities within the white race to share a common euro-nationalist stance after World War II, embodied in Oswald Mosley's Europe a Nation policy. The following chronology can therefore be delineated: an ideological gestation before 1919; the historical experience of fascism between 1919 and 1942, unfolded in several phases; and finally neo-fascism from 1942 onward.
Drawing inspiration from the Italian Social Republic, institutional neo-fascism took the form of the Italian Social Movement (MSI). It became one of the chief reference points for the European far-right until the late 1980s, and "the best (and only) example of a Neofascist party", in the words of political scientist Cas Mudde. At the initiative of the MSI, the European Social Movement was established in 1951 as a pan-European organization of like-minded neo-fascist groups and figures such as the Francoist Falange, Maurice Bardèche, Per Engdahl, and Oswald Mosley.