Kozłowski, Władysław Mieczysław (1858–1935)

Falckenberg, Richard (1851–1920)

Gomme, George Laurence (1853–1916)

Ochorowicz, Julian (1850–1917)

Fabian, Aleksander (1847–1910)

Baldwin, James Mark (1861–1934)

Letourneau, Charles Jean Marie (1831–1902)

Marchlewski, Julian (1866–1925)

Leśniewski, Stanisław (1886–1939)

Hermann, Emanuel (1839–1902) Ânžul, Ivan Ivanovič (1846–1914)

Nusbaum, Henryk (1849–1937)

Mataja, Victor (1857–1934)

Krzywicki, Ludwik (1859–1941)

Ołtuszewski, Władysław (1855–1922)

Plehanov, Georgij Valentinovič (1856–1918)

Nusbaum, Henryk (1849–1937)

Nusbaum, Henryk (1849–1937)

Huxley, Thomas Henry (1825–1895)

Appel, Karol (1857–1930)

Lewiński, Jan (1876–1939)

Kurnatowski, Alfred (1813–1892)

Nusbaum, Henryk (1849–1937)

Sterling, Władysław (c. 1876 – c. 1943)

Korbut, Gabriel (1862–1936)

Posner, Stanisław (1868–1930)