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.
Neurosurgeon Ben Carson is credited with many pioneering neurosurgical procedures. He became a Library of Congress “Living Legend” and received the Presidential Medal of Freedom. He later contested in the 2016 presidential primaries, has authored numerous books, was a Secretary of Housing and Urban Development, and earned 60 honorary doctorates.
Michael Burry had discovered his love for finance and investments while studying medicine. He eventually ditched his medical career to step into hedge-fund management. His story inspired Michael Lewis’s book The Big Short and the Academy Award-winning movie of the same name. He has an artificial eye since age 2.
Nostradamus was a French physician, astrologer, and respected seer whose book Les Prophéties is viewed as a document that predicts future events. Since the publication of the book, Nostradamus has been praised for his accurate predictions of major world events. His life has been the subject of several films and hundreds of books.
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.
Jose Rizal was a Filipino polymath and nationalist. An ophthalmologist by profession, Rizal turned towards writing and inspired the Philippine Revolution through his writings. The revolution eventually led to Philippine independence and Rizal became a national hero. His life has inspired several biographical films and TV series.
11 Ron Paul
Ron Paul is a physician, author, and retired politician who has played an important role in promoting libertarian vision by delivering speeches on American college campuses. A doctor by profession, Ron Paul served in the U.S. Air Force as a flight surgeon from 1963 to 1968. His life and career inspired the 2012 film Ron Paul Uprising.
Best known for his Pulitzer Prize-winning column in The Washington Post, Fox News commentator and political expert Charles Krauthammer was also a qualified psychiatrist. He was rendered paralyzed from the waist down at 22, after an accident while studying medicine at Harvard, but completed his degree nevertheless.
13 Mehmet Oz
Born to Turkish immigrants in the U.S., Mehmet Oz, better known as Dr. Oz, is a renowned cardiothoracic surgeon and professor. He is known for his multiple appearances on The Oprah Winfrey Show and for his YOU series of self-help books. He has also hosted The Dr. Oz Show.
Alexander Fleming was a Scottish microbiologist and physician. He is credited with discovering penicillin, the world's first effective antibiotic substance; a discovery that changed the course of history. He also discovered lysozyme, an antimicrobial enzyme which forms part of the innate immune system. In 1999, Fleming was named in Time magazine's 100 Most Important People of the 20th century list.
15 Hasnat Khan
Better known as former lover of Princess Diana, British-Pakistani cardiac surgeon Hasnat Khan was once described by the late princess as “Mr Wonderful.” He had first met Diana at the Royal Brompton Hospital, where the princess had gone to visit a friend. Hasnat is a distant relative of Imran Khan.
16 Sanjay Gupta
Born to Indian-origin parents in the U.S., Sanjay Gupta is an acclaimed neurosurgeon and medical writer. He has also had a successful stint as a medical reporter for CNN, covering medical issues at wars and disasters. He has played himself in the movie Contagion and is a skilled accordion player.
Jack Kevorkian was a pathologist who believed that euthanasia or mercy killing of terminally ill patients was necessary. He later claimed to have helped 130 patients die and earned the nickname “Dr. Death.” He was later convicted of murder for his role in the voluntary euthanasia of a patient.
20 Jean Piaget
21 Patch Adams
Patch Adams is an American physician, clown, comedian, author, and social activist. Credited with founding the Gesundheit! Institute, Adams advocates an alternative health care model. He also organizes volunteers who travel to various countries every year in order to bring a smile to the faces of patients, orphans, and other people.
22 Doctor Mike
23 Paul Nassif
Former physician Andrew Wakefield had his name removed from the medical register due to his association with a fraudulent 1998 study that claimed there was a link between autism and the vaccine for measles, mumps, and rubella. An anti-vaccination activist, he also taught at the Royal Free and University College.
25 James Watson
26 Jonas Salk
If the world is successful in its fight against polio, the credit goes to American virologist Jonas Salk who developed a vaccine for the disease. Described as a “miracle worker”, his concerns for humanity were reflected in the fact that he did not claim a patent for the vaccine. He founded the Salk Institute for Biological Studies, based in California.
Austrian psychiatrist Viktor Frankl founded logotherapy. He also authored several books, most notably his bestselling autobiographical depiction of his ordeal at various Nazi concentration camps, Man's Search for Meaning. He had lost his parents, brother, and wife in the Holocaust. He later won honors such as the Oskar Pfister Award.
29 Ivan Pavlov
30 Zakir Naik
Islamic preacher Zakir Naik is also the founder of the Islamic Research Foundation and his own broadcast network, Peace TV. Though a qualified surgeon, he later gained fame as a public speaker. His channel is banned in multiple countries, such as India, Bangladesh, and the UK, for its extremist nature.
31 Robert Koch
Robert Koch was a German microbiologist and physician. One of the prominent co-founders of modern bacteriology, Koch is credited with creating and improving laboratory techniques and technologies in the field of microbiology. He is also credited with making important discoveries in public health. In 1905, Robert Koch won the Nobel Prize in Physiology or Medicine for his research on tuberculosis.
Edward Jenner was an English scientist and physician. Referred to as the father of immunology, Jenner is credited with pioneering the concept of vaccines. Jenner's work laid the foundation for subsequent discoveries in the field of immunology; his work is believed to have saved more lives than any other work. In 2002, Jenner was included in BBC’s Greatest Britons list.
Almost 2 decades before germ theory was laid down, Ignaz Semmelweis became the first physician to suggest that hand-washing could prevent the spread of puerperal fever and related deaths. Ironically, after being ridiculed for his theory, he died in a mental asylum, due to an infection from a wound.
34 Sam Sheppard
Frederick Banting was a Canadian medical scientist and physician. In 1923, Banting and Scottish biochemist John James Rickard Macleod received the Nobel Prize in Medicine for the discovery of insulin and its therapeutic potential. Aged 32 at that time, Banting remains the youngest Nobel laureate in physiology or medicine. He was knighted by King George V in 1934.
Psychologist and Stanford professor Philip Zimbardo is best known for his Stanford prison experiment, which proved how prisoners get abusive due to situational factors. He is also known for his books The Lucifer Effect and The Time Paradox and has received a Lifetime Achievement Award from the American Psychological Foundation.
38 Frantz Fanon
Frantz Fanon was a French-West Indian born in Martinique, a former French colony. A skilled psychiatrist and physician, he realized the impact of colonialism on the human mind while treating French soldiers and Algerians. The author of books such as The Wretched of the Earth, Fanon supported the Algerian independence movement.
39 Erik Erikson
Erik Erikson was a German-American psychoanalyst and developmental psychologist best remembered for developing a theory on the psychological development of humans. He is credited with coining the term identity crisis, the failure to achieve ego identity. Also a prolific writer, Erikson won a US National Book Award and a Pulitzer Prize for his book Gandhi's Truth.
40 Howard Dean
43 George Pell
Wilhelm Reich was an Austrian psychoanalyst and doctor of medicine. He is credited with shaping innovations like body psychotherapy, primal therapy, and Gestalt therapy. Also a writer, Reich's books like The Sexual Revolution and The Mass Psychology of Fascism influenced generations of intellectuals. Also a controversial figure, some of Wilhelm Reich's practices caused a disturbance in the psychoanalytic community.
Galen was a Greek physician, philosopher, and surgeon in the Roman Empire. Regarded as one of the most proficient medical researchers in ancient history, Galen influenced the growth of several scientific disciplines, such as neurology, pharmacology, pathology, physiology, and anatomy. Thanks to the translation of his works into Arabic, Galen's approach to medicine remains influential in the Islamic world.
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.
French political theorist, scientist, and physician Jean-Paul Marat was a key figure of the French Revolution. He published his radical views in pamphlets and newspapers, such as L'Ami du people. He was held responsible for the September massacres. His assassination by a Girondin supporter made him a Jacobin martyr.