Alessandra Tarquini, an expert in Italian Fascism, untangles the complicated relationship between the Italian Left and Jews since the late nineteenth century. Due largely to indifference, and sometimes to antisemitism, Italian leftists consistently overlooked Jews in their visions for a collectivist future. Yet, from the birth of the Socialist Party in 1892 until 1992, when the heirs of the Marxist tradition dispersed or set out on a new path, questions continually arose in revolutionary efforts to remake the Italian state: Should Jews be seen as oppressed, and therefore welcome to participate in the struggle that would lead to the advent of a new civilization? Or might they hinder the realization of socialism because of their attachment to a religious identity? Tarquini’s research fills an important lacuna by analyzing the antisemitism of twentieth-century socialist movements. Crucially, however, Tarquini makes important distinctions between antisemitism on the Italian Left and Right, and identifies the relationship between leftism and antisemitism as a distinct formation.