The note stems from the need to carry out a survey on recent international literature dedicated to populism, starting above all from the considerations contained in The Populist Temptation by Eichengreen, and in From Fascism to Populism in History by Finchelstein, as well as the results from the Oxford Handbook of Populism, edited by Rovira Kaltwasser, Taggart, Ochoa Espejo and Ostiguy. The contrasting reflections recorded around a phenomenon so debated allow to delineate the elements, that justify the introduction of a historiographical category in its own right and to project some definitions on the entire history of the Italian political system. The intention of this overview is to construct a catalog of the various interpretations of populism that have emerged in recent years. It is noteworthy that in the years following World War II until the present day, publications on populism have been produced in a discontinuous fashion, thus rendering the subject even more elusive and unclassifiable.