Within the academic context, the concept of totalitarianism has been applied to several regimes, with much debate and disagreements, most notably about the Soviet Union, Fascist Italy, Nazi Germany, the Empire of Japan under Kokkashugi, and Francoist Spain. Totalitarian regimes are usually distinguished from authoritarian regimes in the sense that totalitarianism represents an extreme version of authoritarianism. Authoritarianism primarily differs from totalitarianism in that social and economic institutions exist that are not under governmental control.
Because of differing opinions about the definition of totalitarianism and the variable nature of each regime, it is stated in prose the various opinions given by academics, even when those opinions might conflict or be at angles to each other.