He is considered to be one of the most important scholars of the events leading to the crisis of the liberal Italian state and the rise of fascism.
He has also researched and published extensively on the totalitarian structure of Mussolini's regime, its repressive mechanisms and its system of informants.
Silone i comunisti e la polizia, (coauthored with Dario Biocca), which bolstered the thesis of the collaboration between the well-known Abruzzi author Ignazio Silone and the Fascist political police during the 1920s, was the subject of much debate among historians in Italy and abroad.
He was awarded the Bruno Buozzi Prize in 2005[3] for: ...having contributed, with his book "Le spie del regime," to a deeper understanding of one of the most disturbing and unknown aspects of the Fascist period in Italy.
His book is the culmination of deeply felt and highly accurate research, based on reliable and at times unpublished documents that have spurned the reopening of the debate on the historical truth behind events whose importance had remained under-estimated...