Jean-Jacques Rousseau was a Genevan philosopher, composer, and writer. His political philosophy influenced aspects of the French Revolution. He also helped develop modern economic, political, and educational thought. His writing inspired a transformation in French drama and poetry. His works also influenced such writers around the world as Tolstoy. His works as a composer were acknowledged by composers like Mozart.
Swiss-born British philosopher and author, Alain de Botto,n is best known for his work, Essays in Love, which has sold millions of copies worldwide. He is one of the founders of the educational company, The School of Life, launched in 2008. He is a recipient of "The Fellowship of Schopenhauer", an annual writers' award from the Melbourne Writers Festival.
Mikhail Bakunin was a Russian socialist and anarchist. He is credited with founding an anarchist school of thought called collectivist anarchism. Regarded as one of the most influential personalities of anarchism, Mikhail Bakunin has had a major influence on thinkers like Peter Kropotkin, Herbert Marcuse, Errico Malatesta, Neil Postman, E. P. Thompson, and A. S. Neill.

Swiss Elder Jakob Ammann gave rise to what is now known as the Amish branch of Anabaptism. While he had initially joined the Anabaptist movement, Ammann, a hard-liner, later branched out because of his belief in the strict doctrines of Anabaptism, such as social avoidance.

Born in South Korea, Byung-Chul Han initially studied metallurgy but was fascinated by philosophy after moving to Germany. In his works, he deals with themes such as tiredness and transparency. Though one of the most translated philosophers, he keeps details about his private life away from the media.

Swiss academic Tariq Ramadan made headlines when he was accused of raping several women, including a disabled lady. He was also fined for revealing the name of one of his alleged victims in a book and an interview. The former Oxford professor had previously established Egypt’s Muslim Brotherhood.

Twentieth-century Existentialist Karl Jaspers had initially followed in his father’s footsteps to study law, but had then switched to medicine. One of the pioneers of clinical psychiatry, he applied phenomenology to study mental illnesses and also developed psychopathological research. He was highly influenced by Immanuel Kant’s ideas.

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.

Swiss-born German philosopher and metaphysician Frithjof Schuon was a major figure of the Traditionalist School of thought. He also propagated Religio Perennis and wrote extensively about his belief in God, the absolute principle. Most of his work was penned in French and very few in his mother tongue, German.
Johann Heinrich Lambert was a Swiss polymath whose contributions to the fields of physics, mathematics, map projections, astronomy, and philosophy are considered important by many scholars. He is credited with introducing hyperbolic functions into trigonometry. He is also credited with inventing a hygrometer, which is used to measure the quantity of water vapor in soil and air.

Best known for his research on physiognomy, Johann Kaspar Lavater was also a theologian and an author. He had penned books such as Aussichten in die Ewigkeit and several epic and lyric poems. He died of a grenade wound during the French occupation of Switzerland.

Best known for his popular Journal Intime, Henri Frédéric Amiel was orphaned at an early age and traveled with various European intellectuals to gain knowledge. Apart from teaching aesthetics and moral philosophy, he also wrote volumes of philosophy and poetry, apart from criticism of major philosophers.
Paul Bernays was a Swiss mathematician best remembered for his association with the German mathematician David Hilbert. Bernays is also remembered for making significant contributions to the philosophy of mathematics, axiomatic set theory, and mathematical logic. Paul Bernays is credited with publishing a two-volume work titled Grundlagen der Mathematik, which houses the famous Hilbert–Bernays paradox.

Catholic priest Hans Küng was extraordinarily liberal for his time and went against traditional Christian dogmas. The Vatican eventually censored him for his views, and he was barred from teaching as a Catholic theologian. He is remembered for his book such as On Being a Christian.

Copley Medal-winning geologist and meteorologist Jean-André Deluc had initially studied math and natural sciences, before embarking on business tours across Europe. In course of time, he gathered a huge collection of fossils and minerals. His research areas included the mercury barometer. He was later named a fellow of the Royal Society.

Swiss folklorist and writer Johann Rudolf Wyss is best remembered for editing his father’s 1812 novel The Swiss Family Robinson. While he initially taught philosophy and then worked as a librarian, he later devoted himself to collecting folk tales. He also penned Rufst du, mein Vaterland, the previous Swiss national anthem.

Swiss philosopher and theologian Jean-Pierre de Crousaz had been a professor of math and philosophy at the University of Lausanne and had also served as its rector 4 times. He is best remembered for his works such as Treatise on Beauty and his critique of Pope’s Essay on Man.