19th Century Intellectuals & Academics

Intellectuals are the thinking lot who use their intelligence to demonstrate the different capacities of the human mind. They usually are involved in learning, critical analysis, researching and reasoning. They use their skills in different fields including literature, medicine, law and scientific research. Since times immemorial, the world has been home to several intellectuals and academicians who have utilized their thinking power to articulate a stream of belief which led to the development of theories. When Karl Marx suggested his theories, a school of thought was started and the era began to be known as a Marxist period of thinking. Marxism became a line of belief which is practiced till date. Much like the earlier days, every century has had its share of intellectuals and academicians who have contributed to the world knowledge through their wisdom, thinking and philosophies. In the 19th century, there were several intellectuals and academicians who changed the world with their philosophies. Great intellectuals like Alexander Bain, Alfred Adler, Alfred Russell, Wallace, Arthur Keith, Bernard Berenson and others introduced new theories, philosophies and thinking in various fields to enrich the era’s intellectual and academic history. Their endeavour towards reaching new models and theories assisted in establishing new foundations of belief. Check this section to know about some of the most famous intellectuals and academics of the 19th century.

This ranking is based on an algorithm that combines various factors, including the votes of our users and search trends on the internet.

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 1 Friedrich Nietzsche

Friedrich Nietzsche
20
Famous As: Philosopher
Birthdate: October 15, 1844
Sun Sign: Libra
Birthplace: Röcken, Lützen, Germany
Died: August 25, 1900

German philosopher, cultural critic, composer, and poet Friedrich Nietzsche has had a profound influence on modern intellectual history. He held the Chair of Classical Philology at the University of Basel. His work spanned philosophical polemics, poetry, cultural criticism, and fiction. He suffered from numerous health problems from a young age and died at the age of 55.

 2 Sigmund Freud

Sigmund Freud
24
Famous As: Neurologist
Birthdate: May 6, 1856
Sun Sign: Taurus
Birthplace: Příbor, Czechia
Died: September 23, 1939

Regarded as the father of psychoanalysis, Sigmund Freud was a neurologist. Despite suffering criticism, psychoanalysis remains influential in the fields of psychology and psychiatry; such is the influence Freud has on humanities. Scholars believe that Freud is one of the most influential personalities of the 20th century and that his impact is comparable to that of Marxism and Darwinism.

 3 Carl Jung

Carl Jung
17
Famous As: Psychiatrist
Birthdate: July 26, 1875
Sun Sign: Leo
Birthplace: Kesswil, Thurgau, Switzerland
Died: June 6, 1961

Widely regarded as the father of analytical psychology, Carl Jung is one of the most important contributors to symbolization and dream analysis. The concepts of socionics and a popular psychometric instrument called Myers-Briggs Type Indicator (MBTI) were developed from Jung's theory. Apart from working as a psychiatrist and psychoanalyst, Carl Jung was also an artist, craftsman, builder, and prolific writer.

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 4 W. E. B. Du Bois

W. E. B. Du Bois
9
Famous As: Civil Rights Activists
Birthdate: February 23, 1868
Sun Sign: Pisces
Birthplace: Great Barrington, Massachusetts, United States
Died: August 27, 1963

W. E. B. Du Bois was an American civil rights activist, sociologist, and Pan-Africanist. Du Bois played an instrumental role in fighting for full civil rights for people of color around the world. A co-founder of the National Association for the Advancement of Colored People, Du Bois also played an important role as the leader of the Niagara Movement.

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 5 Immanuel Kant

Immanuel Kant
10
Famous As: Philosopher
Birthdate: April 22, 1724
Sun Sign: Taurus
Birthplace: Königsberg, Germany
Died: February 12, 1804

Immanuel Kant was a German philosopher whose works in fields like aesthetics and metaphysics have made him an important and influential personality in Western philosophy. His views continue to influence contemporary philosophy. Kant has had a major influence on prominent philosophers like Hegel, Schelling, Reinhold, and Fichte. Kant's work on mathematics is cited by Albert Einstein as an early influence.

 6 Bertrand Russell

Bertrand Russell
8
Famous As: Philosopher
Birthdate: May 18, 1872
Sun Sign: Taurus
Birthplace: Trellech, Monmouthshire, Wales
Died: February 2, 1970

Bertrand Russell was a British polymath and Nobel laureate. His work, which is spread across various fields, has had a considerable influence on philosophy, cognitive science, artificial intelligence, mathematics, linguistics, and logic. Russell is also credited with leading the revolt against idealism in Britain and is regarded as one of the founders of analytic philosophy.

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 7 Ralph Waldo Emerson

Ralph Waldo Emerson
6
Famous As: Essayist
Birthdate: May 25, 1803
Sun Sign: Gemini
Birthplace: Boston, Massachusetts, United States
Died: April 27, 1882

Ralph Waldo Emerson was an American philosopher who led the transcendentalist movement that developed in the eastern United States in the 1820s and 1830s. He is credited with popularizing individualism through his numerous lectures and essays. Emerson influenced many thinkers and writers that followed him; he mentored Henry David Thoreau, who went on to become a leading transcendentalist.

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 8 Arthur Schopenhauer

Arthur Schopenhauer
4
Famous As: Philosopher
Birthdate: February 22, 1788
Sun Sign: Pisces
Birthplace: Gdańsk, Poland
Died: September 21, 1860

Arthur Schopenhauer was a German philosopher. He was among the first Western philosophers to affirm important tenets of Indian philosophy, such as denial of the self and asceticism. Schopenhauer's work has had a tremendous posthumous impact on disciplines like science, literature, and philosophy. His work influenced personalities like Albert Einstein, Ludwig Wittgenstein, Sigmund Freud, George Bernard Shaw, and Leo Tolstoy. 

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 9 Max Weber

Max Weber
7
Famous As: Sociologist
Birthdate: April 21, 1864
Sun Sign: Taurus
Birthplace: Erfurt, Germany
Died: June 14, 1920

Max Weber was a German historian, political economist, jurist, and sociologist. Widely regarded as one of the most influential and important theorists, Weber's ideas had a profound influence on social research and social theory. Although he did not see himself as a sociologist, Weber is often counted among the fathers of sociology alongside Émile Durkheim, Auguste Comte, and Karl Marx.

 10 Soren Kierkegaard

Soren Kierkegaard
4
Famous As: Theologian
Birthdate: May 5, 1813
Sun Sign: Taurus
Birthplace: Copenhagen, Denmark
Died: November 11, 1855
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 11 John Maynard Keynes

John Maynard Keynes
7
Famous As: Economist
Birthdate: June 5, 1883
Sun Sign: Gemini
Birthplace: Cambridge ,England
Died: April 21, 1946

John Maynard Keynes was an English economist. His ideas are credited with changing the theory and practice of the economic policies and macroeconomics of governments at a fundamental level. Counted among the 20th century's most influential economists, Keynes' ideas are the basis for Keynesian economics. In 1999, he was named in Time magazine's Most Important People of the Century list.

 12 Georg Wilhelm Friedrich Hegel

Georg Wilhelm Friedrich Hegel
9
Famous As: Philosopher
Birthdate: August 27, 1770
Sun Sign: Virgo
Birthplace: Stuttgart, Germany
Died: November 14, 1831
German philosopher Georg Wilhelm Friedrich Hegel worked on ideas such as absolute idealism; the philosophy of spirit, or Geist; and the master–slave dialectic. His views influenced later thinkers and intellectuals, such as Karl Popper and Karl Marx, with the latter using Hegel’s views on the civil society.
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 13 John Stuart Mill

John Stuart Mill
6
Famous As: British Philosopher and Civil Servant.
Birthdate: May 20, 1806
Sun Sign: Taurus
Birthplace: Pentonville, London, England
Died: May 8, 1873
Nineteenth-century philosopher John Stuart Mill is best remembered for his work On Liberty, which spoke of personal freedom and "the harm principle.” His The Subjection of Women was one of the first works written by a male author that promoted women's rights. He supported Jeremy Bentham's ethical utilitarianism.

 14 William James

William James
6
Famous As: Philosopher, Psychologist
Birthdate: January 11, 1842
Sun Sign: Capricorn
Birthplace: New York City, New York, United States
Died: August 26, 1910

William James was an American psychologist and philosopher. Widely regarded as the father of American psychology and one of the most influential American philosophers, James was the first educator in the United States to offer a course in psychology. He is also credited with co-founding a psychological school of thought called functional psychology and establishing a philosophical school called pragmatism.

 15 John Dewey

John Dewey
5
Famous As: Philosopher
Birthdate: October 20, 1859
Sun Sign: Libra
Birthplace: Burlington, Vermont, United States
Died: June 1, 1952

A staunch advocate of progressive education and liberalism, the American philosopher and psychologist was the founder of the University of Chicago Laboratory Schools. John Dewey’s famous writings included The Reflex Arc Concept in Psychology and Human Nature and Conduct. According to him, passion for knowledge and intellectual curiosity were central to a teacher. He called himself a democratic socialist.

 16 Emile Durkheim

Emile Durkheim
5
Famous As: Sociologist
Birthdate: April 15, 1858
Sun Sign: Aries
Birthplace: Épinal, France
Died: November 15, 1917

Emile Durkheim was a French sociologist. He is credited with establishing the discipline of sociology for academic purposes and is widely regarded as the chief architect of modern social science. During his lifetime, Emile Durkheim published several works on topics like morality, religion, and education. He also played a major role in the development of sociology and anthropology as disciplines.

 17 Ivan Pavlov

Ivan Pavlov
4
Famous As: Physiologist
Birthdate: September 26, 1849
Sun Sign: Libra
Birthplace: Ryazan, Russia
Died: February 27, 1936
Russian physiologist Ivan Pavlov is best remembered for his research in classical conditioning. He became the first Russian Nobel laureate after winning the 1904 Nobel Prize for Physiology or Medicine for his study of the physiology of digestion. His experiment on conditioned reflex using dogs is still studied in colleges.

 18 Friedrich von Hayek

Friedrich von Hayek
6
Famous As: Economist
Birthdate: May 8, 1899
Sun Sign: Taurus
Birthplace: Vienna, Austria
Died: March 23, 1992

A winner of the Nobel Memorial Prize in Economic Sciences, Friedrich von Hayek, was an advocate of classical liberalism. The Austrian-British economist, who was also a political philosopher, co-founded the Mont Pelerin Society. He worked at the London School of Economics, the University of Chicago and the University of Freiburg and authored the popular book, The Road to Serfdom.

 19 Lev Vygotsky

Lev Vygotsky
4
Famous As: Psychologist
Birthdate: November 17, 1896
Sun Sign: Scorpio
Birthplace: Orsha
Died: June 11, 1934

Lev Vygotsky was a Soviet psychologist best remembered for his groundbreaking work on developmental psychology in children. He is also remembered for his work on the relationship between thought and language, which remains influential to this day. A man with various interests, Vygotsky's work covered topics like the philosophy of science and the psychology of art.

 20 Martin Heidegger

Martin Heidegger
10
Famous As: Philosopher
Birthdate: September 26, 1889
Sun Sign: Libra
Birthplace: Messkirch, Germany
Died: May 26, 1976
German philosopher Martin Heidegger was one of the greatest philosophers of the 20th century and is remembered for his work on phenomenology, existentialism, and hermeneutics. He explained his ideas in his book Being and Time. He also introduced the concept of Dasein, or “being,” characteristic of human beings.

 21 Albert Schweitzer

Albert Schweitzer
7
Famous As: Theologian, Polymath
Birthdate: January 14, 1875
Sun Sign: Capricorn
Birthplace: Kaysersberg-Vignoble, France
Died: September 4, 1965

Albert Schweitzer was an Alsatian polymath who won the Nobel Peace Prize in 1952 for his philosophical work, Reverence for Life. He is credited with founding the Albert Schweitzer Hospital, which was a direct result of his philosophical expression. Schweitzer is also credited with influencing the Organ reform movement, which began in the mid-20th-century.

 22 Auguste Comte

Auguste Comte
5
Famous As: Philosopher
Birthdate: January 19, 1798
Sun Sign: Capricorn
Birthplace: Montpellier, France
Died: September 5, 1857
Known as the pioneer of sociology and positivism, philosopher Auguste Comte had an elite schooling at the prestigious École Polytechnique. Though infamous for being egocentric, he was known for his dedication to society and social upliftment. He authored The Positive Philosophy and was influenced by Henri de Saint-Simon.

 23 Charles Spurgeon

Charles Spurgeon
4
Famous As: Baptist Preacher
Birthdate: June 19, 1834
Sun Sign: Gemini
Birthplace: Kelvedon, Essex, England
Died: January 31, 1892

Charles Spurgeon was an English Particular Baptist preacher who was a powerful figure in the Reformed Baptist tradition. Hailed as the "Prince of Preachers", he was well respected by Christians of various denominations. He was pastor of the congregation of the New Park Street Chapel for almost four decades. He was the author of several books, sermons, and commentaries. 

 24 John B. Watson

John B. Watson
5
Famous As: Psychologist
Birthdate: January 9, 1878
Sun Sign: Capricorn
Birthplace: Travelers Rest, South Carolina, United States
Died: September 25, 1958

John B. Watson was the first to introduce the theory of behaviorism to psychology. He believed human behavior, like animal behavior, should be studied under objective and experimental conditions. One of his experiments included conditioning the fear of white rats into an 11-year-old boy he named Little Albert.

 25 Zora Neale Hurston

Zora Neale Hurston
9
Famous As: Folklorist, Anthropologist
Birthdate: January 7, 1891
Sun Sign: Capricorn
Birthplace: Notasulga
Died: January 28, 1960

Zora Neale Hurston was an author, anthropologist, and filmmaker. As an African American woman, she often depicted racial issues in the films she made. Her works also reflected her struggles as a black woman. In her early career, she conducted anthropological and ethnographic research and focused more on writing and film-making in her later years.

 26 Joseph Smith Jr.

Joseph Smith Jr.
10
Famous As: Religious leader, Theologians
Birthdate: December 23, 1805
Sun Sign: Capricorn
Birthplace: Sharon, Vermont, United States
Died: June 27, 1844

Religious leader Joseph Smith Jr. is known as the founder of the Mormonism and the Latter Day Saint movement. He also published the Book of Mormon. He established his communities in Ohio and Missouri and eventually founded the city Nauvoo in Illinois, which became the center of his spiritual activities.

 27 Thomas Robert Malthus

Thomas Robert Malthus
7
Famous As: Political Economist
Birthdate: February 13, 1766
Sun Sign: Aquarius
Birthplace: Surrey, England
Died: December 23, 1834

Thomas Robert Malthus was an English economist and demographer, who viewed poverty as man’s unavoidable destiny. Author of An Essay on the Principle of Population; he believed that increase in national food production results in feeling of well-being, leading to population growth, which in turn results in poverty. Commonly referred as Malthusianism, it made immediate impact on British social policy.

 28 Alfred Adler

Alfred Adler
4
Birthdate: February 7, 1870
Sun Sign: Aquarius
Birthplace: Rudolfsheim-Fünfhaus
Died: May 28, 1937

Alfred Adler was an Austrian psychotherapist and medical doctor. He is credited with founding the school of individual psychology. He was also one of the founders of the psychoanalytic movement along with Sigmund Freud and Freud's colleagues. In 2002, a survey conducted by Review of General Psychology named Adler among the 20th century's most eminent psychologists.

 29 Peter Kropotkin

Peter Kropotkin
5
Famous As: Anarchist, Socialist & Historian
Birthdate: December 9, 1842
Sun Sign: Sagittarius
Birthplace: Moscow, Russia
Died: February 8, 1921

Russian philosopher Peter Kropotkin was a passionate advocate of anarcho-communism. He was also an activist, revolutionary, economist, and sociologist. He was arrested and imprisoned for his activism in 1874. However, he managed to escape and lived in exile for over 40 years in different countries across Europe. He returned to Russia after the Russian Revolution in 1917. 

 30 Wilhelm Wundt

Wilhelm Wundt
4
Famous As: Philosopher
Birthdate: August 16, 1832
Sun Sign: Leo
Birthplace: Mannheim, Germany
Died: August 31, 1920

Wilhelm Wundt was a German physiologist, professor, and philosopher. He is often counted among the founders of modern psychology and is widely considered the father of experimental psychology. He is also credited with founding the first laboratory for psychological research, which he founded at the University of Leipzig in 1879.

 31 Rabindranath Tagore

Rabindranath Tagore
13
Famous As: Poet
Birthdate: May 7, 1861
Sun Sign: Taurus
Birthplace: Kolkata, West Bengal, India
Died: August 7, 1941

Rabindranath Tagore was an Indian polymath who contributed greatly to the fields of literature, art, and philosophy. Referred to as the Bard of Bengal, Tagore is credited with reshaping Bengali literature and music. The first non-European to receive the Nobel Prize in Literature, Tagore is also credited with composing the national anthems of India and Bangladesh.

 32 Franz Boas

Franz Boas
4
Famous As: Anthropologist
Birthdate: July 9, 1858
Sun Sign: Cancer
Birthplace: Minden, Westphalia, Germany
Died: December 21, 1942

Remembered for his research on cultural relativism, German-born American anthropologist Franz Boas is often referred to as the Father of American Anthropology. The son of a merchant, he was a sickly child who grew up reading a lot. He also studied folklore and developed it as an academic discipline.

 33 Florence Nightingale

Florence Nightingale
6
Famous As: Founder of Modern Nursing
Birthdate: May 12, 1820
Sun Sign: Taurus
Birthplace: Florence
Died: August 13, 1910
The Lady with the Lamp Florence Nightingale is remembered for her relentless efforts in nursing soldiers during the Crimean War. She founded London’s St Thomas' Hospital to train nurses. She also pioneered the use of the polar area diagram and was the first female member of the Royal Statistical Society.

 34 Sarvepalli Radhakrishnan

Sarvepalli Radhakrishnan
25
Famous As: Confident, Ambitious
Birthdate: September 5, 1888
Sun Sign: Virgo
Birthplace: Thiruttani, Tamil Nadu, India
Died: April 17, 1975

Sarvepalli Radhakrishnan was the second President of India and served from 1962 to 1967. He is regarded as one of India’s most eminent scholars and wrote extensively on Indian philosophy and religion. Lifelong he defended Hindu traditions and culture against criticism from the West. September 5, his birthday, is observed as Teachers Day in India, in his honour.

 35 Henry David Thoreau

Henry David Thoreau
5
Famous As: Poet, Naturalist, Essayist
Birthdate: July 12, 1817
Sun Sign: Cancer
Birthplace: Concord, Massachusetts, United States
Died: May 6, 1862

Henry David Thoreau was an American philosopher, essayist, poet, and naturalist. He is credited with popularizing transcendentalism and simple living. His philosophy of civil disobedience, which was detailed in his essay of the same name, later influenced world-renowned personalities like Leo Tolstoy, Martin Luther King Jr., and Mahatma Gandhi.

 36 T. E. Lawrence

T. E. Lawrence
16
Famous As: Archaeologist
Birthdate: August 16, 1888
Sun Sign: Leo
Birthplace: Tremadog, Wales
Died: May 19, 1935
T. E. Lawrence was a British army officer who participated in the Arab Revolt, against the Ottoman regime, during World War I. Nicknamed Lawrence of Arabia, he inspired a movie of the same name. His treatise of his war experiences was published as Seven Pillars of Wisdom, his best-known work.

 37 Henri Bergson

Henri Bergson
5
Famous As: Philosopher
Birthdate: October 18, 1859
Sun Sign: Libra
Birthplace: Paris, France
Died: January 4, 1941

French philosopher, Henri Bergson, is remembered for his contribution to the tradition of continental philosophy. His works were considered extremely influential,  especially during the first half of the 20th century. He received the Nobel Prize in Literature (1927) and  Grand-Croix de la Legion d'honneur (1930). He was a simple man who led a humble life despite his great achievements.

 38 H. G. Wells

H. G. Wells
5
Famous As: Writer
Birthdate: September 21, 1866
Sun Sign: Virgo
Birthplace: Bromley, Kent, England
Died: August 13, 1946

H. G. Wells was an English writer. Although he was prolific in many genres, he is best remembered for his work on sci-fi novels, for which he is often referred to as the father of science fiction. His 1901 novel The First Men in the Moon became so influential that a lunar impact crater is named after him.

 39 Johann Wolfgang von Goethe

Johann Wolfgang von Goethe
4
Famous As: Poet, Playwright, Novelist
Birthdate: August 28, 1749
Sun Sign: Virgo
Birthplace: Goethe House, Frankfurt, Germany
Died: March 22, 1832

Regarded as the greatest literary figure in Germany's modern era, Johann Wolfgang von Goethe was a statesman and writer. Apart from writing poetry and prose, he also wrote treatises on color, anatomy, and botany. Thanks to his literary genius, Goethe was made part of the Duke's privy council in Weimar and he implemented several reforms at the University of Jena.

 40 Alfred Marshall

Alfred Marshall
4
Famous As: Economist
Birthdate: July 26, 1842
Sun Sign: Leo
Birthplace: Bermondsey
Died: July 13, 1924

One of the co-founders of the English neoclassical school of economics, 19th-century economist Alfred Marshall is best remembered for his path-breaking book Principles of Economics. His studies on topics such as marginal utility, consumer’s surplus, and the elasticity of demand, enriched the field of economics for years to come.

 41 Ludwig Wittgenstein

Ludwig Wittgenstein
5
Famous As: Philosopher
Birthdate: April 26, 1889
Sun Sign: Taurus
Birthplace: Vienna, Austria
Died: April 29, 1951

Austrian-British philosopher Ludwig Wittgenstein is remembered for his works related to logic, the philosophy of mind, the philosophy of mathematics, and the philosophy of language. He taught at the University of Cambridge for many years. He published only one book during his lifetime. Most of his manuscripts were collected later and published posthumously.

 42 Jiddu Krishnamurti

Jiddu Krishnamurti
9
Famous As: Public Speaker & Philosopher
Birthdate: May 12, 1895
Sun Sign: Taurus
Birthplace: Madanapalle
Died: February 17, 1986

Jiddu Krishnamurti was an Indian philosopher, speaker, and writer. Many years after his death, Krishnamurti's supporters oversee several schools based on his views and ideas. The Krishnamurti Foundation runs several schools in India and foreign countries. Among those who were influenced by his works were Toni Packer, Dada Dharmadhikari, and Achyut Patwardhan.

 43 Khalil Gibran

Khalil Gibran
4
Famous As: Artist
Birthdate: January 6, 1883
Sun Sign: Capricorn
Birthplace: Bsharri, Lebanon
Died: April 10, 1931

Lebanese author and poet Khalil Gibran is best remembered for his bestselling works The Prophet and Broken Wings. One of the leaders of the Mahjar movement of Arabic literature, he specialized in incorporating mythological and mystical symbols in his works and was inspired by Friedrich Nietzsche and William Blake.

 44 Ludwig von Mises

Ludwig von Mises
7
Famous As: Economist, Philosopher
Birthdate: September 29, 1881
Sun Sign: Libra
Birthplace: Lviv, Ukraine
Died: October 10, 1973
A polyglot at age 12, Austrian School economist Ludwig von Mises grew up to acquire a doctorate in law and taught at the universities of New York and Vienna. Known for his works such as The Anti-Capitalistic Mentality, he supported free-market liberalism and opposed socialism. 

 45 Karen Horney

Karen Horney
7
Famous As: Psychoanalyst
Birthdate: September 16, 1885
Sun Sign: Virgo
Birthplace: Blankenese, Hamburg, Germany
Died: December 4, 1952

Remembered for her pioneering work on feminist psychology, Karen Horney studied medicine at a time when women weren’t allowed in universities. Going against Sigmund Freud’s concept of penis envy, she suggested the idea of womb envy. She believed psychological differences weren’t rooted in gender but rather depended on the socio-cultural influences.

 46 John Henry Newman

John Henry Newman
4
Famous As: Theologian
Birthdate: February 21, 1801
Sun Sign: Pisces
Birthplace: City of London, England
Died: August 11, 1890

An important figure in the English religious history, John Henry Newman was a nineteenth century theologian, scholar and poet. Famed for leading the Oxford movement in the Church of England, he later switched to the Roman Catholic Church, eventually becoming the Cardinal Deacon of St. George in Velabro.  Also an influential educator and writer, he was canonized in October 2019.

 47 Rosa Luxemburg

Rosa Luxemburg
14
Famous As: Marxist economist
Birthdate: March 5, 1871
Sun Sign: Pisces
Birthplace: Zamosc, Poland
Died: January 15, 1919
Polish Marxist and socialist revolutionary Rosa Luxemburg was a member of parties such as the SPD, the USPD, and the KPD. Luxemburg was an anti-war activist and taught economics and Marxism at SPD's Berlin training center. She was assassinated by the Freikorps troops during the German Revolution

 48 Johnny Appleseed

Johnny Appleseed
4
Famous As: Missionary
Birthdate: September 26, 1774
Sun Sign: Libra
Birthplace: Leominster, Massachusetts, United States
Died: March 18, 1845
Nurseryman John Chapman, better known to people as Johnny Appleseed, is remembered for introducing apple trees in areas across the American states of Pennsylvania, Indiana, Ohio, and Illinois, and West Virginia. His aim as a missionary of The New Church was to help local settlers make cider.

 49 Edmund Husserl

Edmund Husserl
4
Famous As: Philosopher
Birthdate: April 8, 1859
Sun Sign: Aries
Birthplace: Prostějov, Czechia
Died: April 27, 1938

Edmund Husserl was a German philosopher of Moravian origin. He established the school of phenomenology. He studied mathematics, physics, and astronomy at the University of Leipzig and worked as an assistant to mathematician Karl Weierstrass. He later became a professor of philosophy and taught for several years. He is considered a major figure in 20th-century philosophy.  

 50 George Boole

George Boole
4
Famous As: Mathematician, Philosopher, Logician
Birthdate: November 2, 1815
Sun Sign: Scorpio
Birthplace: Lincoln, Lincolnshire, England
Died: December 8, 1864

George Boole is remembered for pioneering Boolean algebra, a tool used in digital computer circuits. More of a self-taught mathematician, Boole began teaching at 16 and later grew up to be a math professor at Queen’s College, Cork. His work in differential equations and algebraic logic was groundbreaking.