The correct answer is: "the rise of fascism "
Benito Mussolini was the leader of the National Fascist Party and became the Italian Prime Minister between 1922 until his defeat in 1943 during WWII, when the allied powers derrocated his fascist state.
He was the founder of Italian fascism, he rejected socialism, egalitarianism and class conflict and, instead, claimed for a nationalist revolution beyond social classes or divisions. Italy became an ally of nazi Germany and fought beside Hitler.