Arthur Schopenhauer

1788 CE – 1860 CE

Danzig (now Gdansk)

German philosopher from Danzig whose account of representation, blind will, pessimistic metaphysics, compassion ethics, aesthetics, and music reshaped nineteenth-century and modern philosophy.

Charles Sanders Peirce

1839 CE – 1914 CE

Cambridge, Massachusetts

American logician, scientist, and founder of pragmaticism whose work joined the pragmatic maxim, semiotic theory, fallibilism, abduction, probability, categories, scientific method, and evolutionary metaphysics.

Edmund Husserl

1859 CE – 1938 CE

Prostějov (Prossnitz), Moravia

Founder of phenomenology, trained in mathematics and logic, whose work on intentionality, epoché, consciousness, meaning, evidence, and the lifeworld reshaped twentieth-century philosophy.

Ernst Mach

1838 CE – 1916 CE

Chrlice / Chirlitz, near Brno

Austrian physicist and philosopher from Moravia whose anti-metaphysical empiricism, analysis of sensations, historical criticism of mechanics, and economy of thought shaped modern philosophy of science.

Feng Guifen

1809 CE – 1874 CE

Wuxian / Mudu, Suzhou, Jiangsu

Late Qing scholar-official from Suzhou whose statecraft reform program joined Confucian moral order with selective adoption of Western learning, manufacturing, military technology, public institutions, and practical science.

Friedrich Engels

1820 CE – 1895 CE

Barmen, Rhine Province, Prussia

German socialist philosopher, political economist, and cofounder of Marxism whose historical materialism, capitalism critique, dialectics, class analysis, and later editorial work shaped modern socialist theory.

Friedrich Nietzsche

1844 CE – 1900 CE

Röcken, Saxony, Prussia

German philosopher of genealogy, perspectivism, tragedy, value creation, nihilism, and the critique of Christianity whose work reshaped modern ethics, aesthetics, psychology, and continental philosophy.

Friedrich Wilhelm Joseph Schelling

1775 CE – 1854 CE

Leonberg, Wuerttemberg

German Idealist philosopher of nature, freedom, identity, art, mythology, and revelation whose work links post-Kantian idealism with Romantic science, philosophical theology, and later existential and continental reception.

Georg Wilhelm Friedrich Hegel

1770 CE – 1831 CE

Stuttgart, Duchy of Württemberg

German Idealist philosopher of dialectic, absolute idealism, recognition, freedom, ethical life, history, art, nature, religion, and systematic philosophy.

Gottlob Frege

1848 CE – 1925 CE

Wismar

German logician, mathematician, and philosopher whose concept-script, modern quantificational logic, logicism, sense-reference distinction, concept-object analysis, and anti-psychologism helped launch analytic philosophy and reshape logic, language, mathematics, and truth.

John Dewey

1859 CE – 1952 CE

Burlington, Vermont

American pragmatist philosopher of instrumentalism, democratic experimentalism, progressive education, inquiry, experience, logic, ethics, aesthetics, public life, science, and naturalistic religion.

John Stuart Mill

1806 CE – 1873 CE

Pentonville, London

English liberal utilitarian philosopher of liberty, individuality, higher pleasures, inductive logic, political economy, representative government, women's equality, religious skepticism, and empiricist method.

Kang Youwei

1858 CE – 1927 CE

Su Village, Danzao, Nanhai County, Guangdong, now Nanhai District, Foshan

Late Qing Confucian reformer whose New Text Confucianism, constitutional monarchism, Confucian religious reform, Datong utopianism, and calligraphy theory reshaped modern Chinese political and philosophical debate.

Karl Marx

1818 CE – 1883 CE

Trier, Rhine Province, Kingdom of Prussia

German philosopher of historical materialism, alienation, class struggle, ideology critique, political economy, capitalism, communism, religion critique, and social transformation.

Liang Qichao

1873 CE – 1929 CE

Xinhui, Guangdong

Cistercian monk, abbot of late Qing and early Republican reformism, and medieval Christian philosopher-theologian whose theology of love, humility, grace, free choice, mystical ascent, monastic ethics, scriptural exegesis, and ecclesial counsel shaped scholastic, monastic, and political theology.

Rudolf Carnap

1891 CE – 1970 CE

Ronsdorf, Wuppertal

German-American logical empiricist of the Vienna Circle, Aufbau construction theory, anti-metaphysics, physicalist language, logical syntax, semantics, linguistic frameworks, confirmation theory, inductive logic, probability, theoretical terms, and scientific philosophy.

Søren Kierkegaard

1813 CE – 1855 CE

Copenhagen

Danish philosopher of subjectivity, indirect communication, pseudonymous authorship, anxiety, despair, faith, love, the single individual, and critique of Christendom.

Theodor W. Adorno

1903 CE – 1969 CE

Frankfurt am Main

German critical theorist, philosopher, sociologist, and music theorist of the Frankfurt School whose negative dialectics, nonidentity, culture industry critique, aesthetics, music sociology, authoritarianism analysis, and postwar social philosophy shaped contemporary critical theory.

Wei Yuan

1794 CE – 1857 CE

Shaoyang, Hunan, Qing China

Late Qing Chinese statecraft thinker, historian, and geographer whose works joined Confucian practical learning, maritime defense, foreign geography, and reform-minded strategies for learning from foreign powers.

William James

1842 CE – 1910 CE

New York City, New York

American philosopher and psychologist whose pragmatism, radical empiricism, stream-of-consciousness psychology, pluralism, and philosophy of religion reshaped modern philosophy.

Zhang Zhidong

1837 CE – 1909 CE

Xingyi, Guizhou, Qing China; ancestral home Nanpi, Zhili/Hebei

Late Qing Confucian statesman and reform thinker whose Zhongti Xiyong formula joined classical moral-political substance to Western practical learning, technology, schooling, and institutional modernization.