[1] A freethinker holds that beliefs should not be formed on the basis of authority, tradition, revelation, or dogma,[2] and should instead be reached by other methods such as logic, reason, and empirical observation.
[6] The Oxford English Dictionary defines freethinking as, "The free exercise of reason in matters of religious belief, unrestrained by deference to authority; the adoption of the principles of a free-thinker."
"[9][10] The basic summarizing statement of the essay The Ethics of Belief by the 19th-century British mathematician and philosopher William Kingdon Clifford is: "It is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence.
[19] The pansy serves as the long-established and enduring symbol of free thought; literature of the American Secular Union inaugurated its usage in the late 1800s.
It allegedly received this name because the flower is perceived by some to bear resemblance to a human face, and in mid-to-late summer it nods forward as if deep in thought.
[20] In the 1880s, following examples set by freethinkers in France, Belgium, Spain and Sweden, it was proposed in the United States as "the symbol of religious liberty and freedom of conscience".
[21] Critical thought has flourished in the Hellenistic Mediterranean, in the repositories of knowledge and wisdom in Ireland and in the Iranian civilizations (for example in the era of Khayyam (1048–1131) and his unorthodox Sufi Rubaiyat poems).
Beyond puns, irony, and satire, Gargantua's prologue-metaphor instructs the reader to "break the bone and suck out the substance-full marrow" ("la substantifique moëlle"), the core of wisdom.
[28] The Université Libre de Bruxelles and the Vrije Universiteit Brussel, along with the two Circles of Free Inquiry (Dutch and French speaking), defend the freedom of critical thought, lay philosophy and ethics, while rejecting the argument of authority.
In France, the concept first appeared in publication in 1765 when Denis Diderot, Jean le Rond d'Alembert, and Voltaire included an article on Liberté de penser in their Encyclopédie.
[31] François-Jean Lefebvre de la Barre (1745–1766) was a young French nobleman, famous for having been tortured and beheaded before his body was burnt on a pyre along with Voltaire's Philosophical Dictionary.
[33] Free thought organizations developed the "Jugendweihe" (literally Youth consecration), a secular "confirmation" ceremony, and atheist funeral rites.
[37] Following Hitler's rise to power in 1933, most free thought organizations were banned, though some right-wing groups that worked with so-called Völkische Bünde (literally "ethnic" associations with nationalist, xenophobic and very often racist ideology) were tolerated by the Nazis until the mid-1930s.
[42] In the last years of the Ottoman Empire, free thought made its voice heard by the works of distinguished people such as Ahmet Rıza, Tevfik Fikret, Abdullah Cevdet, Kılıçzade Hakkı, and Celal Nuri İleri.
Mustafa Kemal Atatürk –field marshal, revolutionary statesman, author, and founder of the secular Turkish nation state, serving as its first President from 1923 until his death in 1938– was the practitioner of their ideas.
Such positions were formally documented for the first time in 1697 by William Molyneux in a widely publicized letter to John Locke, and more extensively in 1713, when Anthony Collins wrote his Discourse of Free-thinking, which gained substantial popularity.
The freethought movement first organized itself in the United States as the "Free Press Association" in 1827 in defense of George Houston, publisher of The Correspondent, an early journal of Biblical criticism in an era when blasphemy convictions were still possible.
During this time Robert Dale Owen sought to introduce the philosophic skepticism of the Free Thought movement into the Workingmen's Party in New York City.
The Free Enquirer's annual civic celebrations of Paine's birthday after 1825 finally coalesced in 1836 in the first national freethinkers organization, the "United States Moral and Philosophical Society for the General Diffusion of Useful Knowledge".
"[63] "Many of the anarchists were ardent freethinkers; reprints from free thought papers such as Lucifer, the Light-Bearer, Freethought and The Truth Seeker appeared in Liberty...The church was viewed as a common ally of the state and as a repressive force in and of itself.
In the Spanish individualist anarchist magazines Ética and Iniciales "there is a strong interest in publishing scientific news, usually linked to a certain atheist and anti-theist obsession, philosophy which will also work for pointing out the incompatibility between science and religion, faith, and reason.
[65]In 1901, the Catalan anarchist and freethinker Francesc Ferrer i Guàrdia established "modern" or progressive schools in Barcelona in defiance of an educational system controlled by the Catholic Church.
[67][failed verification] Ferrer's ideas, generally, formed the inspiration for a series of Modern Schools in the United States,[66] Cuba, South America, and London.
[68] Freemasonry attracted many freethinkers and became a hub of the movement, during the Enlightenment era due to its emphasis on inclusive membership, logic, rationalism, and religious tolerance.
[69] Freemasonry's origins from stonemason guilds meant its symbolism and rituals drew on concepts from the Trivium and Quadrivium, they include the Mastery of Grammar, Rhetoric, logic then mastery of arithmetic, geometry, music, and astronomy as well as other arts such as the mechanical arts, reflecting Enlightenment ideals in the goal of making its members Masters of their thoughts and opinions thus making them Freethinkers.
Influential early Speculative Masonic writings by James Anderson and Jean-Theophile Desaguliers frequently cited Isaac Newton and promoted Newtonian scientific ideas.
[70] Freemasonry's multi-tiered system of initiation rituals allegorically used the tools, stages, and concepts of architecture and mechanics to represent enlightenment and self-improvement through education and reason.
[69] This openness allowed men of diverse faiths, including freethinkers and deists, to join local lodges throughout Europe and America in the Enlightenment era.
While utilizing religious imagery and themes, Freemasonry intentionally avoided dogmatic disputes and focused its moral lessons on shared values of virtue, charity, and righteousness.
[69] This religious tolerance attracted Enlightenment thinkers, like Voltaire, who viewed organized religion as upholding oppressive traditional monarchs and hindering free thought.