In the 20th century, and especially since the end of World War II, the received interpretation of Italian unification, the Risorgimento, has become the object of historical revisionism. The justifications offered for unification, the methods employed to realise it and the benefits supposedly accruing to unified Italy are frequent targets of the revisionists. Some schools have called the Risorgimento an imperialist or colonialist venture.
Some revisionists tend to negatively re-evaluate key characters of Italian national unity, such as Camillo Benso di Cavour, Giuseppe Garibaldi and Victor Emmanuel II of Savoy. They grafted in this way in the debate on the causes of the so-called Southern Question (Questione Meridionale), and say that the Risorgimento was a true work of colonization, followed by a centralizing policy of conquest, because of which the Italian Mezzogiorno would have fallen into a state of backwardness still manifest. Others consider that the policies of tax, toll and industry implemented in the southern regions by the Savoy government since 1861, together with endogenous factors, have further depleted the area or they have affected its development.
The ideas behind the revisionist movement already began to awaken and strengthen in the years immediately following the events that led to the Kingdom of Sardinia to become the Kingdom of Italy, even before the birth of a historical debate on the subject. The first doubts about the reasons behind the foreign policy of the House of Savoy were raised by Giuseppe Mazzini, one of the theorists and supporters of Italian unification. In this regard Mazzini suggested in his paper "Italy of the people" that the government of Cavour was not interested in the principle of a united Italy, but simply to push the boundaries of the Savoy state. Even once Italy was unified, Mazzini returned to attack the Government in respect of the new nation: