Plekhanov, (1856–1918) Konstantin Pobedonostsev, (1827–1907) Henri Poincaré, (1854–1912) Michael Polanyi, (1891–1976) Emil Leon Post, (1897–1954) Roscoe Pound, (1870–1964) Karl von Prantl, (1820–1888) Henry Habberley Price, (1899–1984) Harold Arthur Prichard, (1871–1947) Pierre-Joseph Proudhon, (1809–1865) Q R Gustav Radbruch, (1878–1949) Sarvepalli Radhakrishnan, (1888–1975) Hastings Rashdall, (1858–1924) Felix Ravaisson-Mollien, (1813–1900) Paul Rée, (1849–1901) Wilhelm Reich, (1897–1957) Hans Reichenbach, (1891–1953) Adolf Reinach, (1883–1917) Karl Renner, (1870–1950) Charles Bernard Renouvier, (1815–1903) I. A. Richards, (1893–1979) Heinrich Rickert, (1863–1936)* Bernhard Riemann, (1826–1866) George Croom Robertson, (1842–1892) Erwin Rohde, (1845–1898) Francisco Romero (1891–1962) Johann Karl Friedrich Rosenkranz, (1805–1879) Franz Rosenzweig, (1886–1929) Alf Niels Christian Ross, (1899–1979) William David Ross, (1877–1971) Josiah Royce, (1855–1916) Vasily Rozanov, (1856–1919) Arnold Ruge, (1802–1880) Bertrand Russell, (1872–1970) S Émile Saisset, (1814–1863) George Santayana, (1863–1952) Ferdinand de Saussure, (1857–1913) Max Scheler, (1874–1928) F. C. S. Schiller, (1864–1937) Moritz Schlick, (1882–1936) Carl Schmitt, (1888–1985) Erwin Schrödinger, (1887–1961) Joseph Schumpeter, (1883–1950) Alfred Schütz, (1899–1959) Albert Schweizer, (1875–1965) Charles Secrétan, (1815–1895) Roy Wood Sellars, (1880–1973) Lev Shestov, (1866–1938) Gustav Gustavovich Shpet, (1879–1937) Henry Sidgwick, (1838–1900) Georg Simmel, (1858–1918) Thoralf Skolem, (1887–1963) Vladimir Solovyov, (1853–1900) Georges Sorel, (1847–1922) William Ritchie Sorley, (1855–1935) Othmar Spann, (1878–1950) Herbert Spencer, (1820–1903) Thomas Spencer Baynes, (1823–1887) Oswald Spengler, (1880–1936) Afrikan Spir, (1837–1890) Lysander Spooner, (1808–1887) Walter Terence Stace, (1886–1967) Henry Stanton, (1805–1887) Olaf Stapledon, (1886–1950) L. Susan Stebbing, (1885–1943) Edith Stein, (1891–1942) Rudolf Steiner, (1861–1925) Leslie Stephen, (1832–1904) James Hutchison Stirling, (1820–1909) Max Stirner, (1806–1856) George Frederick Stout, (1860–1944) David Friedrich Strauss, (1808–1874) Leo Strauss, (1899–1973) Carl Stumpf, (1848–1936) James Sully, (1842–1923) Sun Yat-sen, (1866–1925) T Debendranath Tagore, (1817–1905) Rabindranath Tagore, (1861–1941) Hippolyte Taine, (1828–1893) T'an Ssu-t'ung, (1864–1898) Tanabe Hajime, (1885–1962) Władysław Tatarkiewicz, (1886–1980) Harriet Taylor Mill, (1807–1858) Gustav Teichmuller (1837–1888) Pierre Teilhard de Chardin, (1881–1955) William Temple, (1881–1944) Frederick Robert Tennant, (1866–1957) Henry David Thoreau, (1817–1862) Paul Tillich, (1886–1965) Alexis de Tocqueville, (1805–1859) Leo Tolstoy, (1828–1910) Friedrich Adolf Trendelenburg, (1802–1872) Ernst Troeltsch, (1865–1923) Leon Trotsky, (1879–1940) Benjamin Tucker, (1854–1939) Kazimierz Twardowski, (1866–1938) U Pietro Ubaldi, (1886–1972) Hermann Ulrici, (1806–1884) Miguel de Unamuno, (1864–1936) Dimitri Uznadze, (1886–1950) V Hans Vaihinger, (1852–1933) John Veitch, (1829–1894) John Venn, (1834–1923) Milan Vidmar, (1885–1962) Lev Vygotsky, (1896–1934) Boris Petrovich Vysheslavtsev, (1877–1954) W Jean Wahl, (1888–1974) Friedrich Waismann, (1896–1959) Alfred Russel Wallace, (1823–1913) James Ward, (1843–1925) John B. Watson, (1878–1958) Watsuji Tetsuro, (1889–1960) Max Weber, (1864–1920)* Otto Weininger, (1880–1903) Christian Hermann Weisse, (1801–1866) Victoria, Lady Welby, (1837–1912) Felix Weltsch, (1884–1964) Edvard Westermarck, (1862–1939) Hermann Weyl, (1885–1955)