Various historians and other authors have carried out a comparison of Nazism and Stalinism, with particular consideration to the similarities and differences between the two ideologies and political systems, the relationship between the two regimes, and why both came to prominence simultaneously. During the 20th century, comparisons of Nazism and Stalinism were made on totalitarianism, ideology, and personality cult. Both regimes were seen in contrast to the liberal democratic Western world, emphasising the similarities between the two.[1]
Political scientists Hannah Arendt, Zbigniew Brzezinski, and Carl Joachim Friedrich, and historian Robert Conquest were prominent advocates of applying the totalitarian concept to compare Nazism and Stalinism.[2][3] Historians Sheila Fitzpatrick and Michael Geyer highlight the differences between Nazism and Stalinism, with Geyer saying that the idea of comparing the two regimes has achieved limited success.[4] Historian Henry Rousso defends the work of Friedrich et al., while saying that the concept is both useful and descriptive rather than analytical, and positing that the regimes described as totalitarian do not have a common origin and did not arise in similar ways.[5] Historians Philippe Burrin and Nicolas Werth take a middle position between one making the leader seem all-powerful and the other making him seem like a weak dictator.[5] Historians Ian Kershaw and Moshe Lewin take a longer historical perspective and regard Nazism and Stalinism not as examples of a new type of society but as historical anomalies and dispute whether grouping them as totalitarian is useful.[6]
Other historians and political scientists have made comparisons between Nazism and Stalinism as part of their work. The comparison has long provoked political controversy,[7][8] and in the 1980s led to the historians' dispute within Germany known as the Historikerstreit.[9]