The honest history: Fascism was intellectually architected by Giovanni Gentile, a philosopher who drew on Hegelian idealism, a tradition that split into right- and left-wing schools (Gentile followed the idealist line, not the Marxist one). Benito Mussolini himself was a socialist who was expelled from the Italian Socialist Party in 1914 for supporting Italy's entry into World War I. So the question, "if it was developed by the left, how did it become a right thing?", is a fair one.
The answer: The origin of an ideology's architects does not determine where the ideology lands. What matters is the ideology's actual content, and fascism's content is definitively right-wing by every meaningful measure:
- It violently suppressed communists and socialists, often the first groups sent to camps
- It maintained private property and formed alliances with industrialists and landowners
- It promoted national hierarchy and racial inequality, deeply anti-egalitarian
- It emphasized tradition, authority, and national glory over progress and liberation
- It explicitly positioned itself as the mortal enemy of Marxism and international socialism
Mussolini's break from socialism was not superficial, he rejected the core left-wing principle of class struggle and international worker solidarity. A useful analogy: if someone grows up religious but becomes an atheist activist, we do not call atheism a religious movement simply because that person came from religion. The final ideology is what counts, not the biography of its founders.
The "third way" positioning: Fascism deliberately rejected both liberal capitalism and Marxist socialism, calling itself a "third way." This is why it can feel hard to classify. But its core values, ultranationalism, hierarchy, anti-egalitarianism, and militant anti-communism, are why historians and political scientists place it on the far right. The spectrum is not perfectly linear; fascism occupies a distinct authoritarian-nationalist position that borrowed rhetorical elements from multiple traditions while being hostile to all of them in practice.