- Claude Henri de Rouvroy, comte de Saint-Simon 1760 – 1825
- François Marie Charles Fourier 1772 – 1837
- Pierre-Joseph Proudhon ( 1809 – 1865)
- Mikhail Alexandrovich Bakunin (1814 – 1876)
- Pierre-Henri Leroux 1797 – 1871
- Ferdinand Lassalle 1825 – 1864
- Eduard Bernstein 1850 – 1932
Communism
- Gracchus Babeuf 1760-1797
- Moses Hess 1812 – 1875
- Joseph Déjacque 1821 – 1864
- Marx & Engels
- Lenin 1870 – 1924
- Rosa Luxemburg 1871 – 1919
- Friedrich Pollock 1894 – 1970
- Max Horkheimer 1895 – 1973
- Herbert Marcuse 1898 – 1979
- Franz Neumann 1900 – 1954
- Theodor W. Adorno 1903 – 1969