Bogdanov, Aleksandr Aleksandrovič (1873–1928)

Baldwin, James Mark (1861–1934)

Fagnot, François (1866–1939)

Lafargue, Paul (1842–1911)

Biegański, Władysław (1857–1917)

Biegański, Władysław (1857–1917)

Kautsky, Karl (1854–1938)

Kautsky, Karl (1854–1938)

Kempner, Stanisław Aleksander (1857–1924)

Miklaševskij, Aleksandr Nikolaevič (1864–1911)

Jaeckh, Gustav (1866–1907)

Lucianus Samosatensis (c. 120 – c. 190)

Twardowski, Kazimierz (1866–1938)

Achelis, Thomas (1850–1909)

Limanowski, Bolesław (1835–1935)

Meyer, Max Wilhelm (1853–1910)

Bölsche, Wilhelm (1861–1939)

Høffding, Harald (1843–1931)

Garfein-Garski, Stanisław (1867–1928)

Ciembroniewicz, Józef (1877–1929) Szyc, Aniela (1869–1921)

Lunačarskij, Anatolij Vasil'evič (1875–1933)

Kobyłecki, Stanisław (1864–1939)

Jaurès, Jean (1859–1914) Lafargue, Paul (1842–1911)

Czaki, Franciszek (1874–1935)

Klimke, Friedrich August (1878–1924)