People of the Revolution and the USSR
- Giacinto Menotti Serrati Giacinto Menotti Serrati Italian Socialist leader who took his party into the Comintern but refused to expel the reformists, causing the Livorno split of 1921
- Ivanoe Bonomi Ivanoe Bonomi A reformist politician who organized compromises between fascism's fall and the monarchy
- Angelica Isaakovna Balabanova Анжелика Исааковна Балабанова The Comintern's first secretary, who taught Mussolini and branded him traitor