Under the radar of the apparent socialst takeover there was Mussolini, and the now infamous - third way.
Initially, Mussolinis views lined up rather well with those of socialism, but they diverged at one crucial point. The issue of Italy in war. The Socialist Party urged the people to stay neutral in war, as war was an inter-imperialist conflict and the socialist sought revolutionary internationalism. To bring change in their own nation, and not engage in conflict with other nations.
Mussolini saw it differently, and he gradually adopted a more extreme nationalist view. He formally renounced socialism in 1918 in his paper, claiming that it was for 'combatants and producers' instead.
Mussolini was now one of many, looking for an alternative to revolutionary socialism and capitalism. A third way. There were many seperate groups, the Futurists, Fasci di Azione Rivoluzionaria, Italian Nationalist Associations and later, the Arditi Association. These groups views only differed on the minute details, and to what extent their extremes reached. But they wanted the same thing, an authoritarian government that would defend their interests.
In March of 1919 Mussolini himself tried to bring the scattered groups together. All representatives met in MIlan and on March 28 they formed a Fascio di Combattimento (combat group). These fascists members later became known as the Fascists of the First Hour.
To his credit, much of the reason that fascism suceeded as it did in Italy was down to Mussolini, as it was in this period that he made some very good plays to ensure that he had as many people as possible behind him. He converted the aforementioned combat group to a formal political part known as the National Fascist Party, he kept the policies vague declaring i to be against socialism and liberalism and sthriving for a strong and ordered Italy. Fascism needed to find its feet in an unorganized Italian state, and though he wasn't the absolute leader, Mussolini was the man behind solving that.