Resolution criteria
This resolves to the single option (“True” or “False”) that matches whether Benito Mussolini, in his capacity as Italy’s dictator (1922–1945), is classified as a left-wing/leftist leader by authoritative reference works.
On resolution, check both of the following:
Encyclopaedia Britannica’s entry on Benito Mussolini. (britannica.com)
US Holocaust Memorial Museum’s Holocaust Encyclopedia pages defining fascism and describing Mussolini. If these characterize fascism/Mussolini as opposing socialism/left-wing ideologies and not leftist, select “False”; if they explicitly classify Mussolini’s dictatorship as leftist, select “True.” (encyclopedia.ushmm.org)
Scope: assesses ideology during his dictatorship only (not his pre-1922 socialist period). Ties or ambiguity default to “False” unless both sources explicitly support “True.”
Background
Britannica: Mussolini began as a socialist (editor of Avanti!), was expelled in 1914 over WWI, founded the Fascist movement/party, and ruled Italy as a fascist dictator from 1922 to 1943, then led the German-backed Italian Social Republic (1943–45). (britannica.com)
USHMM: Fascism is an ultranationalist, authoritarian ideology that rejects socialism and pluralist democracy; Mussolini founded Italian Fascism and established a one-party dictatorship following the March on Rome. (encyclopedia.ushmm.org)
Considerations
Some argue fascism had “third way” or syndicalist elements, but mainstream scholarship classifies it as a right-wing, anti-socialist ideology; do not count Mussolini’s early-life socialism toward this question, which is about his rule as dictator. (encyclopedia.ushmm.org)