Luigi Fabbri (23 December 1877 – 24 June 1935) was an Italian anarchist, writer, agitator and propagandist who was charged with defeatism during the World War I. He was the father of Luce Fabbri.
Born in Fabriano (Ancona), Italy in 1877, Fabbri was first sentenced for anarchist activities at the age of 16 in Ancona, and spent many years in and out of Italian prisons. Fabbri was a long time and prolific contributor to the anarchist press in Europe and later South America, including co-editing, along with Errico Malatesta, the paper L'Agitazione. He helped edit the paper "Università popolare" in Milan. Fabbri was a delegate to the International Anarchist Congress held in Amsterdam in 1907. He died in Montevideo, Uruguay in 1935.
- Life of Malatesta, translated by Adam Wight (originally published 1936). This book was published again with expanded content in 1945.
- Malatesta: L'Uomo e il Pensiero
- Bourgeois Influences on Anarchism (in English)
- Letters to a Woman on Anarchy, 1905
- Workers' Organisation and Anarchy, 1906 pamphlet
- Anarchist Organisation, 1907 pamphlet
- The School and the Revolution, 1912
- Letters to a Socialist, 1913
- The Aware Generation, 1913
- Dictatorship and Revolution, 1921
- Preventive Counter-revolution, 1922
- Editor of L'Agitazione
- Founded Il Pensiero, Lotta Umana, Studi Sociali
- Contributed to La Question Sociale, Pensiero e Volontà, Fede Libero Accordo, L'Avvenire Sociale