Жорж-Луи Ле́клерк, граф де Бюффон: Жизнь и научное наследие

French naturalist of the 18th century

Georges Louis Leclerc, Comte de Buffon (ʒɔʁʒ lwi ləklɛʁ kɔ̃t də byfɔ̃; 7 September 1707 – 16 April 1788) was a French naturalist, mathematician, and cosmologist. He held the position of intendant (director) at the Jardin du Roi, now called the Jardin des plantes. Buffon's works influenced the next two generations of naturalists, including two prominent French scientists Jean Baptiste Lamarck and Georges Cuvier. Buffon published thirty six quarto volumes of his Histoire Naturelle during his lifetime, with additional volumes based on his notes and further research being published in the two decades following his death. Ernst Mayr wrote that "Truly, Buffon was the father of all thought in natural history in the second half of the 18th century". Credited with being one of the first naturalists to recognize ecological succession, he was later forced by the theology committee at the University of Paris to recant his theories about geological history and animal evolution because they contradicted the biblical narrative of Creation.

Georges Louis Leclerc (later Comte de Buffon) was born at Montbard, in the province of Burgundy to Benjamin François Leclerc, a minor local official in charge of the salt tax and Anne Christine Marlin, also from a family of civil servants. Georges was named after his mother's uncle (his godfather) Georges Blaisot, the tax farmer of the Duke of Savoy for all of Sicily. In 1714 Blaisot died childless, leaving a considerable fortune to his seven year old godson. Benjamin Leclerc then purchased an estate containing the nearby village of Buffon and moved the family to Dijon acquiring various offices there as well as a seat in the Dijon Parlement. Georges attended the Jesuit College of Godrans in Dijon from the age of ten onwards. From 1723 to 1726 he then studied law in Dijon, the prerequisite for continuing the family tradition in civil service. In 1728 Georges left Dijon to study mathematics and medicine at the University of Angers in France. At Angers in 1730 he made the acquaintance of the young English Duke of Kingston, who was on his grand tour of Europe, and traveled with him on a large and expensive entourage for a year and a half through southern France and parts of Italy. There are persistent but completely undocumented rumors from this period about duels, abductions and secret trips to England. In 1732 after the death of his mother and before the impending remarriage of his father, Georges left Kingston and returned to Dijon to secure his inheritance. Having added 'de Buffon' to his name while traveling with the Duke, he repurchased the village of Buffon, which his father had meanwhile sold off. With a fortune of about 80,000 livres (at the time, worth nearly 27 kilograms of gold), Buffon set himself up in Paris to pursue science, at first primarily mathematics and mechanics, and the increase of his fortune.

In 1732 he moved to Paris, where he made the acquaintance of Voltaire and other intellectuals. He lived in the Faubourg Saint Germain, with Gilles François Boulduc, first apothecary of the King, professor of chemistry at the Royal Garden of Plants, member of the Academy of Sciences. He first made his mark in the field of mathematics and, in his Sur le jeu de franc carreau (On the game of fair square), introduced differential and integral calculus into probability theory; the problem of Buffon's needle in probability theory is named after him. In 1734 he was admitted to the French Academy of Sciences. During this period he corresponded with the Swiss mathematician Gabriel Cramer. His protector Maurepas had asked the Academy of Sciences to do research on wood for the construction of ships in 1733. Soon afterward, Buffon began a long term study, performing some of the most comprehensive tests to date on the mechanical properties of wood. Included were a series of tests to compare the properties of small specimens with those of large members. After carefully testing more than a thousand small specimens without knots or other defects, Buffon concluded that it was not possible to extrapolate to the properties of full size timbers, and he began a series of tests on full size structural members. In 1739 he was appointed head of the Parisian Jardin du Roi with the help of Maurepas; he held this position to the end of his life. Buffon was instrumental in transforming the Jardin du Roi into a major research center and museum. He also enlarged it, arranging the purchase of adjoining plots of land and acquiring new botanical and zoological specimens from all over the world. Thanks to his talent as a writer, he was invited to join Paris's second great academy, the Académie Française in 1753 and then in 1768 he was elected to the American Philosophical Society. In his Discours sur le style ("Discourse on Style"), pronounced before the Académie française, he said, "Writing well consists of thinking, feeling and expressing well, of clarity of mind, soul and taste  The style is the man himself" ("Le style c'est l'homme même"). Unfortunately for him, Buffon's reputation as a literary stylist also gave ammunition to his detractors: the mathematician Jean le Rond d'Alembert, for example, called him "the great phrase monger". In 1752 Buffon married Marie Françoise de Saint Belin Malain, the daughter of an impoverished noble family from Burgundy, who had been enrolled in the convent school run by his sister. Madame de Buffon's second child, a son born in 1764, survived childhood; she herself died in 1769. When in 1772 Buffon became seriously ill and the promise that his son (then only 8) should succeed him as director of the Jardin became clearly impracticable and was withdrawn, the King raised Buffon's estates in Burgundy to the status of a county – and thus Buffon (and his son) became a count. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1782. Buffon died in Paris in 1788. He was buried in a chapel adjacent to the church of Sainte Urse Montbard; during the French Revolution, his tomb was broken into and the lead that covered the coffin was ransacked to produce bullets. His son, George Louie Marie Buffon (often called Buffonet) was guillotined on July 10, 1794. Buffon's heart was initially saved, as it was guarded by Suzanne Necker (wife of Jacques Necker), but was later lost. Today, only Buffon's cerebellum remains, as it is kept in the base of the statue by Pajou that Louis XVI had commissioned in his honor in 1776, located at the Museum of Natural History in Paris.

Buffon's Histoire naturelle, générale et particulière (1749–1788: in 36 volumes; an additional volume based on his notes appeared in 1789) was originally intended to cover all three "kingdoms" of nature but the Histoire naturelle ended up being limited to the animal and mineral kingdoms, and the animals covered were only the birds and quadrupeds. "Written in a brilliant style, this work was read by every educated person in Europe". In the opening volumes of the Histoire naturelle Buffon questioned the usefulness of mathematics, criticized Carl Linnaeus's taxonomical approach to natural history, outlined a history of the Earth with little relation to the Biblical account, and proposed a theory of reproduction that ran counter to the prevailing theory of pre existence. The early volumes were condemned by the Faculty of Theology at the Sorbonne. Buffon published a retraction, but he continued publishing the offending volumes without any change. In the course of his examination of the animal world, Buffon noted that despite similar environments, different regions have distinct plants and animals, a concept later known as Buffon's Law. This is considered to be the first principle of biogeography. He made the suggestion that species may have both "improved" and "degenerated" after dispersing from a center of creation. In volume 14 he argued that all the world's quadrupeds had developed from an original set of just thirty eight quadrupeds. On this basis, he is sometimes considered a "transformist" and a precursor of Darwin. He also asserted that climate change may have facilitated the worldwide spread of species from their centers of origin. Still, interpreting his ideas on the subject is not simple, for he returned to topics many times in the course of his work. Buffon originally held that “the animals common both to the old and new world are smaller in the latter,” ascribing this to environmental conditions. Upon meeting Buffon,Thomas Jefferson attempted “to convince him of his error,” noting that “the reindeer could walk under the belly of our moose.” Buffon, who was “absolutely unacquainted” with the moose, asked for a specimen. Jefferson dispatched twenty soldiers to the New Hampshire woods to find a bull moose for Buffon as proof of the "stature and majesty of American quadrupeds". According to Jefferson, the specimen “convinced Mr. Buffon. He promised in his next volume to set these things right." In Les époques de la nature (1778) Buffon discussed the origins of the Solar System, speculating that the planets had been created by a comet's collision with the Sun. He also suggested that the Earth originated much earlier than 4004 BC, the date determined by Archbishop James Ussher. Basing his figures on the cooling rate of iron tested at his Laboratory the Petit Fontenet at Montbard, he calculated that the Earth was at least 75,000 years old. Once again, his ideas were condemned by the Sorbonne, and once again he issued a retraction to avoid further problems. Buffon knew of the existence of extinct species as mammoths or European rhinos. And some of his assumptions have inspired current models, such as continental drift.

Buffon believed in monogenism, the concept that all humanity has a single origin, and that physical differences arose from adaptation to environmental factors, including climate and diet. He speculated on the possibility that the first humans were dark skinned Africans, but did not pinpoint the area of human origin beyond delineating it as “the most temperate climate [that] lies between the 40th and 50th degree of latitude.” This geophysical band encompasses portions of Europe, North America, North Africa, Mongolia, and China. Controversially for a European of his era, Buffon did not believe that Europe was the cradle of human civilization. Instead he stated that Japanese and Chinese culture were “of a very ancient date,” and that Europe “only much later received the light from the East it is thus in the northern countries of Asia that the stem of human knowledge grew." Buffon thought that skin color could change in a single lifetime, depending on the conditions of climate and diet. Clarence Glacken suggests that "The environmental changes through human agency described by Buffon were those which were familiar and traditional in the history of Western civilization". However, Buffon also challenged Carl Linnaeus' conceptualization of the fixed division of race. In this sense, Buffon expands his perspective on monogenism that associating these dissimilar traits and features into one larger category rather than in a fixed division. This brought to his conceptualization on distinguishing race in a broad and narrow sense; in a broad sense, race means larger groups of people who inhabit a huge region known as a continent; while in a narrow sense, it denotes equivalently with "nation". With this, he implies his ambivalence in defining race by looking at specific traits to differenciate them but at the same time he rejects the idea of categorizing race in a specific fixed division. Therefore, because Buffon seems to favor in working on gerealization and marking the similarities rather than the difference in the race categorization.

Buffon (crater), a lunar impact crater located on the southern hemisphere of the far side of the Moon. Lycée Buffon, a secondary school in the 15th arrondissement of Paris. , a street bordering the Jardin des Plantes in the 5th arrondissement of Paris. Rue Buffon (Dijon) Rue Buffon], a street in Dijon, France.