What were 2 reasons behind the rise of fascism and socialism in the 1900s?

The rise of fascism in Italy began during World War I, when Benito Mussolini and other radicals formed a political group (called a fasci) supporting the war against Germany and Austria-Hungary.

Beginning in 1922, Fascist paramilitaries escalated their strategy from attacking socialist offices and homes of socialist leadership figures to violent occupation of cities, eventually setting their sites on Rome.

SocialismThe history of socialism has its origins in the 1789 French Revolution and the changes which it brought, although it has precedents in earlier movements and ideas ... By 1968, the prolonged Vietnam War (1959-1975) gave rise to the New Left, socialists who tended to be critical of the Soviet Union and social democracy. Fascism

Fascism arose in Europe after World War I when many people yearned for national unity and strong leadership. In Italy, Benito Mussolini used his charisma to establish a powerful fascist state. Benito Mussolini coined the term "fascism" in 1919 to describe his political movement.