2 Hannah Arendt
Hannah Arendt was a political theorist. Widely regarded as one of the 20th century's most prominent political thinkers, Hannah Arendt's articles and books have had a significant influence on philosophy and political theory. Her life and work inspired the 2012 biographical drama film, Hannah Arendt. Her work has also inspired several biographies written by popular authors.
3 Judith Butler
4 Ayn Rand
Ayn Rand was a Russian-American philosopher and writer. Apart from publishing two best-selling novels, Ayn Rand is credited with developing a philosophical system called Objectivism. Over the years, Ayn Rand has been a major influence among American conservatives and libertarians. Some of the famous personalities influenced by her include Amber Heard, Vince Vaughn, Jimmy Wales, Ayelet Shaked, and Mary Ruwart.
5 Mary Wollstonecraft
Mary Wollstonecraft was an English writer, advocate of women's rights, and philosopher. Wollstonecraft, who attracted a lot of attention for her unconventional personal relationships, is widely considered a founding feminist philosopher. Although her unorthodoxy initially attracted criticisms, her advocacy of women's equality became increasingly important during the 20th century. Modern-day feminists cite her works and her life as important influences.
6 Hypatia
7 Rosa Luxemburg
8 Helena Blavatsky
Russian philosopher Helena Blavatsky, or Madame Blavatsky, was one of the co-founders of the Theosophical Society. She popularized the slogan “There is no religion higher than truth.” She was inspired by the Arya Samaj and later converted to Buddhism. She also wrote books such as The Secret Doctrine.
9 Friedrich Engels
Friedrich Engels was a German philosopher, political scientist, and revolutionary socialist. Along with Karl Marx, Engels helped develop Marxism, which has had a profound impact on fields like philosophy and anthropology. Engels is credited with helping Marx publish Das Kapital, a foundational theoretical work in politics, economics, and materialist philosophy. He also co-authored influential political documents like The Communist Manifesto.
10 Juana Inés de la Cruz

Mexican nun Juana Inés de la Cruz was one of the finest authors of the Latin American colonial era. Initially the lady-in-waiting of Mexico’s viceroy, she later took her vows. She built a huge library and penned masterpieces such as the poem Primero sueño and the religious drama El divino Narciso.
11 Simone Weil
12 Iris Murdoch

One of the most popular Irish-born British novelists, Iris Murdoch is remembered for her psychological novels, which had a good dose of sexuality, philosophy, morality, and comic elements. While she won the Booker Prize for The Sea, the Sea, the Oxford alumnus had also worked for the HM Treasury and the UN.
13 Christina Hoff Sommers
14 Edith Stein
Edith Stein was a German Jewish philosopher who studied at the University of Freiburg and completed her dissertation on empathy. Always interested in Catholicism, she read the autobiography of the mystic Teresa of Ávila and converted to Christianity, and became a Discalced Carmelite nun. She was killed in the Auschwitz concentration camp and is canonized as a martyr.
15 Luce Irigaray

16 Martha Nussbaum

17 Émilie du Châtelet

18 Pema Chodron

Pema Chodron is an American Tibetan Buddhist and an ordained nun. Born as Deirdre Blomfield-Brown in New York, she began studying with Tibetan Buddhist Lama Chime Rinpoche as a young woman. She eventually became a fully ordained nun or bhikṣuṇī. She is the author of several dozen books and audiobooks. She is the principal teacher at Gampo Abbey.
19 Charles Fourier

French social theorist Charles Fourier is regarded as one of the pioneers of utopian socialism. Apart from advocating social reconstruction based on phalanges, or Fourierism, he is also credited with coining the term feminism with respect to women’s rights. The Social Destiny of Man remains one of his notable works.
20 Julia Kristeva

21 Sophie Germain
French mathematician Sophie Germain had used the pseudonym M. Le Blanc to get hold of notes from the École Polytechnique, as being a woman, she was not allowed to attend the institute. She later contributed to the number theory and also pioneered the elasticity theory. She died of breast cancer.
22 Hildegard of Bingen
Hildegard of Bingen was a German writer, composer, Christian mystic, visionary, philosopher, polymath, and Benedictine abbess of the High Middle Ages. Apart from being the most-recorded composers of sacred monophony in modern history, Hildegard of Bingen is also widely regarded as the founder of scientific natural history.
23 Harriet Martineau

Regarded by many as the first female sociologist, Harriet Martineau was a prominent 19th-century social theorist, classical economist, and intellectual who penned the iconic work The Positive Philosophy of Auguste Comte. She was partially deaf and had lost her sense of taste and smell in childhood.
24 Philippa Foot

Philippa Foot is remembered as a forerunner of what is now known as virtue ethics. Granddaughter of American president Grover Cleveland, Foot laid down the Trolley problem and believed that the morality of any act is related to its rationality. She was also associated with the charitable organization Oxfam.
25 Hélène Cixous
Hélène Cixous is a professor, poet, playwright, rhetorician, literary critic, philosopher, and French feminist writer. She is best known for writing an article titled The Laugh of the Medusa, which earned her popularity and established her as a thinker in post-structural feminism.
26 Grace Lee Boggs

27 Germaine de Staël

Germaine de Staël was a French political theorist and woman of letters. She is best remembered for her collaboration with the popular Swiss-French political thinker Benjamin Constant. Germaine, who was way ahead of her time, is widely regarded as a precursor of feminism.
28 Héloïse

29 Savitri Devi

Born in Lyon, Frenchwoman Maximiani Julia Portas later changed her name to Savitri Devi and adopted Nazism. The ardent cat lover earned a PhD in philosophy and later acquired Greek nationality and served as an Axis spy. She claimed Adolf Hitler was an avatar of the Hindu god Vishnu.
30 Anna Comnena
31 Mary Parker Follett

32 Elena Cornaro Piscopia

33 Carol Gilligan

Carol Gilligan is an American psychologist, ethicist, and feminist. She is renowned for her work on ethical relationships and ethical community. She also serves as a professor of Applied Psychology and Humanities at New York University. Considered the chief architect of the ethics of care, Gilligan was named in the 25 most influential people list by Time magazine in 1996.
34 Maria Gaetana Agnesi
Italian mathematician Maria Gaetana Agnesi, daughter of an affluent silk trader, was well-versed in a number of languages as a child. Most of her work was regarding algebra, calculus, and the Witch of Agnesi. She was also the first female academic to write a math book and to teach math.
35 Lady Margaret Lucas Cavendish

Lady Margaret Lucas Cavendish was an English poet, philosopher, playwright, fiction writer, and scientist. Margaret, who had the audacity to publish her works without using a pen name at a time when female writers remained anonymous, was ahead of her time. Not surprisingly, she was considered eccentric and earned the nickname Mad Madge. Her works gained popularity in the 1980s.
36 Gayle Rubin

Gayle Rubin is a cultural anthropologist known for writing on a wide range of topics, such as feminism, sadomasochism, prostitution, homosexuality, pedophilia, and pornography. She studied at the University of Michigan and was part of early feminist groups. After earning her Ph.D. in anthropology, she began her academic career. She is also associated with several feminist journals.
37 Mary Daly

38 Anna-Teresa Tymieniecka

Anna-Teresa Tymieniecka was a Polish American phenomenologist and philosopher. She is credited with founding the World Phenomenology Institute (WPI) where she remained as the president until her death in 2014. Anna-Teresa Tymieniecka also contributed immensely to the popular book series Analecta Husserliana, serving as its editor since its inception in 1968.
39 G. E. M. Anscombe

A prominent figure in the philosophical movement of Analytical Thomism, British analytic philosopher G. E. M. Anscombe is remembered for her writings on the philosophy of mind, philosophy of language, philosophical logic, philosophy of action, and ethics. The term consequentialism was introduced by her in the article Modern Moral Philosophy which has influenced the emergence of contemporary virtue ethics.
40 Alice Miller

Apart from being a renowned psychologist, Alice Miller became an international sensation with her debut book, The Drama of the Gifted Child, a bestseller. A Holocaust survivor, who had lost her father in a Jewish ghetto, she analyzed child abuse, including education, violence, and parental abuse.
41 Adrian Piper

42 Diotima of Mantinea

43 Judith Jarvis Thomson

44 Saint Teresa of Avila
Teresa of Ávila, also known as Saint Teresa of Jesus, was a Spanish noblewoman who later turned into a Carmelite nun. She was posthumously named a Doctor of the Church. She co-established the Discalced Carmelite Order. Her written works include The Interior Castle and her own autobiography.
45 Iris Marion Young

46 Eve Kosofsky Sedgwick

47 Akka Mahadevi

48 Mary Midgley

Leading British moral philosopher Mary Midgley, described as a fiercely combative philosopher by The Guardian, was known for her work on ethics, science and animal rights. She worked as senior lecturer in philosophy at Newcastle University and penned over 15 books, including Beast and Man, Animals and Why They Matter, Evolution as a Religion and Science as Salvation.
49 Patricia Hill Collins

50 Paul B. Preciado

Born a woman, Paul B. Preciado initially identified himself as a lesbian and later announced his slow transition to being a man. A celebrated author and philosopher, he has penned books such as Testo Junkie, written columns on gender and sexuality, and taught subjects such as gender theory.