Positivists

Russian dramatist and author (1860–1904)

French philosopher, mathematician and sociologist (1798–1857)

French sociologist (1858–1917)

Austrian physicist (1838–1916)

Harriet Martineau was an English social theorist. She wrote from a sociological, holistic, religious and feminine angle, translated works by Auguste Comte, and, rare for a woman writer at the time, earned enough to support herself.

French lexicographer and philosopher (1801-1881)

Belgian author, librarian and anti-colonial thinker (1868–1944)

Guatemalan President (1835-1885)

Romanian diplomat and academic (1877-1948)

Italian geologist (1813-1881)

Mexican philosopher (1912–2004)

English philosopher (1818–1899)

Romanian politician and academic (1833-1906)

Turkish author (1852-1887)

British historian and philosopher

ukrainian-Russian philosopher (1837 – 1905)

American poet, lecturer

Romanian writer (1858-1917)

Polish philosopher (1855-1913)

French educator and political radical (1831–1895)

Spanish philosopher (1848–1904)

French psychiatrist (1832-1884)