How did the economic crisis in Italy, after the First World War, create unrest there?

Due to the expenses in the First World War, Italy's national debt had increased manifold. The price and the value of money had decreased. There was a great shortage of food-grains in the country and unemployment was increasing day-by-day. The industries and trade were ruined. The condition of the middle class people, farmers and the working class became very critical. As a result of the war, Italy suffered a lot and her people became very poor. Such a deteriorated condition created unrest in the country.