Giordano Bruno

He was the first real martyr, — neither frightened by perdition, nor bribed by heaven. He was the first of all the world who died for truth without expectation of reward. He did not anticipate a crown of glory. ...
-Robert Ingersoll
Giordano Bruno (1548, Nola – February 17, 1600, Rome) was an Italian philosopher, priest, cosmologist, and occultist. Bruno is known for his mnemonic system based upon organized knowledge and as an early proponent of the idea of an infinite and homogeneous universe. Burnt at the stake as a heretic by the Roman Inquisition, Bruno is seen by some as the first "martyr for science."
Born in Nola (in Campania, then part of the Kingdom of Naples) in 1548, he was originally named Filippo Bruno. His father was Giovanni Bruno, a soldier. At the age of eleven he traveled to Naples to study the Trivium. At 15, Bruno entered the Dominican Order, taking the name of Giordano from Giordano Crispo, his metaphysics tutor. He continued his studies, completing his novitiate, and becoming an ordained priest in 1572.
He was interested in philosophy, and was an expert on the art of memory; he wrote books on mnemonic technique, which Frances Yates contends may have been disguised Hermetic tracts.
While the Hermetic tradition was a major influence on Bruno, he also absorbed and developed the heliocentric ideas of Copernicus, though he claimed that his own mystical understanding of heliocentrism was far more important than Copernicus's understanding, which Bruno considered merely mathematical. Other significant influences included Thomas Aquinas, whose works he had to study in depth as a novice and for whom he always expressed a curiously deep admiration, Averroes, whose idea of a universal mind resonates through Bruno's work, Duns Scotus, the Renaissance Neoplatonist Marsilio Ficino, the Spanish Ramon Llull and, last but certainly not least, Nicholas of Cusa's ideas on infinity and indeterminacy, particularly the idea of an infinite universe where the Earth is elevated to the divine status of a star. Bruno developed a pantheistic hylozoistic system, essentially incompatible with orthodox Christian Trinitarian beliefs.
In 1576 he left Naples to avoid the attention of the Inquisition. He left Rome for the same reason and abandoned the Dominican order. He travelled to Geneva and briefly joined the Calvinists, before he was excommunicated, ostensibly for slandering the philosophy professor Antoine de la Faye. After Bruno apologized his excommunication was revoked, but in autumn 1579, deeply disappointed by Calvinist intolerance, he left for France.
He went first to Lyon, but he could not find work there and in late 1579 he arrived in Toulouse, at that time a Catholic stronghold, where he obtained a position as lecturer of philosophy. After the bitter experience in Geneva, he also tried to revert to mainstream Catholicism, but he was denied absolution by the Jesuit priest that he approached. After religious strife broke out in Toulouse in summer 1581, he moved to Paris, where first he held a cycle of thirty lectures on theological topics. At this time, he also began to gain fame for his prodigious memory. Bruno's feats of memory were based, at least in part, on his elaborate system of mnemonics, but some of his contemporaries found it easier to attribute them to magical powers. His talents attracted the benevolent attention of the king Henry III, who supported a conciliatory, middle-of-the-road cultural policy between Catholic and Protestant extremism.
Henry III of France - a patron of Bruno's
In Paris he enjoyed the protection of his powerful French patrons. During this period, he published several works on mnemonics, a.o. "De umbris idearum" (The Shadows of Ideas, 1582), "Ars Memoriae" (The Art of Memory, 1582), "Cantus Circaeus" (Circe's Song, 1582), based on his model of organised knowledge, opposed to that of Petrus Ramus. In 1582 Bruno also published a comedy summarizing some of his philosophical positions, titled "Il Candelaio" ("The Torchbearer").
John Dee
In April 1583, he went to England with letters of recommendation from Henry III, working for the French ambassador, Michel de Castelnau. There he became acquainted with the poet Philip Sidney and with the Hermetic circle around John Dee. He also unsuccessfully sought a teaching position at Oxford, where however he held lectures. His views spurred controversy, notably with John Underhill, Rector of Lincoln College and from 1589 bishop of Oxford, and George Abbot, who later became Archbishop of Canterbury, who poked fun at Bruno for supporting “the opinion of Copernicus that the earth did go round, and the heavens did stand still; whereas in truth it was his own head which rather did run round, and his brains did not stand still." and who reports accusations of plagiarising Ficino's work. Still, the English period was a fruitful one. During that time Bruno completed and published some of his most important works, the "Italian Dialogues," including the cosmological tracts "La Cena de le Ceneri" (The Ash Wednesday Supper, 1584), "De la Causa, Principio et Uno" (On Cause, Prime Origin and the One, 1584), "De l'Infinito Universo et Mondi" (On the Infinite Universe and Worlds, 1584) as well as "Lo Spaccio de la Bestia Trionfante" (The Expulsion of the Triumphant Beast, 1584) and "De gl' Heroici Furori" (On Heroic Frenzies, 1585). Some of the works that Bruno published in London, notably the "The Ash Wednesday Supper," appear to have given offense. It was not the first time, nor was it to be the last, that Bruno's controversial views coupled with his abrasive sarcasm lost him the support of his friends.
George Abott, later Archbishop of Canterbury, mocked Bruno for sharing the opinion of Copernicus
In October 1585, after the French embassy in London was attacked by a mob, he returned to Paris with Castelnau, finding a tense political situation. Moreover, his 120 theses against Aristotelian natural science and his pamphlets against the mathematician Fabrizio Mordente soon put him in ill favor. In 1586, following a violent quarrel about Mordente's invention, "the differential compass," he left France for Germany.
In Germany he failed to obtain a teaching position at Marburg, but was granted permission to teach at Wittenberg, where he lectured on Aristotle for two years. However, with a change of intellectual climate there, he was no longer welcome, and went in 1588 to Prague, where he obtained 300 taler from Rudolf II, but no teaching position. He went on to serve briefly as a professor in Helmstedt, but had to flee again when he was excommunicated by the Lutherans, continuing the pattern of Bruno's gaining favor from lay authorities before falling foul of the ecclesiastics of whatever hue.
Rudolf II, Holy Roman Emperor - patron of Bruno's
The year 1591 found him in Frankfurt. Apparently, during the Frankfurt Book Fair, he received an invitation to Venice from the patrician Giovanni Mocenigo, who wished to be instructed in the art of memory, and also heard of a vacant chair in mathematics at the University of Padua. Apparently believing that the Inquisition might have lost some of its impetus, he returned to Italy.
Giovanni Mocenigo, patron who betrayed Bruno to the Inquistion
He went first to Padua, where he taught briefly, and applied unsuccessfully for the chair of mathematics, which was assigned instead to Galileo Galilei one year later. Bruno accepted Mocenigo's invitation and moved to Venice in March 1592. For about two months he functioned as an in-house tutor to Mocenigo. When Bruno announced his plan to leave Venice to his host, the latter, who was unhappy with the teachings he had received and had apparently developed a personal rancour towards Bruno, denounced him to the Venetian Inquisition, which had Bruno arrested on May 22, 1592. Among the numerous charges of blasphemy and heresy brought against him in Venice, based on Mocenigo's denunciation, was his belief in the plurality of worlds, as well as accusations of personal misconduct. Bruno defended himself skillfully, stressing the philosophical character of some of his positions, denying others and admitting that he had had doubts on some matters of dogma. The Roman Inquisition, however, asked for his transferral to Rome. After several months and some quibbling the Venetian authorities reluctantly consented and Bruno was sent to Rome in February 1593.
In Rome he was imprisoned for seven years during his lengthy trial, lastly in the Tower of Nona. Some important documents about the trial are lost, but others have been preserved, among them a summary of the proceedings that was rediscovered in 1940. [4] The numerous charges against Bruno, based on some of his books as well as on witness accounts, included blasphemy, immoral conduct, and heresy in matters of dogmatic theology, and involved some of the basic doctrines of his philosophy and cosmology. Luigi Firpo lists them as follows:
Holding opinions contrary to the Catholic Faith and speaking against it and its ministers.
Holding erroneous opinions about the Trinity, about Christ's divinity and Incarnation.
Holding erroneous opinions about Christ.
Holding erroneous opinions about Transubstantiation and Mass.
Claiming the existence of a plurality of worlds and their eternity.
Believing in metempsychosis and in the transmigration of the human soul into brutes.
Dealing in magics and divination.
Denying the Virginity of Mary.
Cardinal Bellarmine - inquisitor and judge in Bruno's trial
Pope Clement VIII - rejected Bruno's appeal
Bruno continued his Venetian defensive strategy, which consisted in bowing to the Church's dogmatic teachings, while trying to preserve the basis of his philosophy. In particular Bruno held firm to his belief in the plurality of worlds, although he was admonished to abandon it. His trial was overseen by the inquisitor Cardinal Bellarmine, who demanded a full recantation, which Bruno eventually refused. Instead he appealed in vain to Pope Clement VIII, hoping to save his life through a partial recantation. The Pope expressed himself in favor of a guilty verdict. Consequently, Bruno was declared a heretic, handed over to secular authorities on February 8 1600. At his trial he listened to the verdict on his knees, then stood up and said: "Perhaps you, my judges, pronounce this sentence against me with greater fear than I receive it." A month or so later he was brought to the Campo de' Fiori, a central Roman market square, his tongue in a gag, tied to a pole naked and burned at the stake, on February 17, 1600.

Bruno's cosmology

Bruno believed, as is now universally accepted, that the Earth revolves and that the apparent diurnal rotation of the heavens is an illusion caused by the rotation of the Earth around its axis. He also saw no reason to believe that the stellar region was finite, or that all stars were equidistant from a single center of the universe.
In 1584, Bruno published two important philosophical dialogues, in which he argued against the planetary spheres. (Two years later, Rothmann did the same in 1586, as did Tycho Brahe in 1587.) Bruno's infinite universe was filled with a substance -- a "pure air," aether, or spiritus -- that offered no resistance to the heavenly bodies which, in Bruno's view, rather than being fixed, moved under their own impetus. Most dramatically, he completely abandoned the idea of a hierarchical universe. The Earth was just one more heavenly body, as was the Sun. God had no particular relation to one part of the infinite universe more than any other. God, according to Bruno, was as present on Earth as in the Heavens, an immanent God, the One subsuming in itself the multiplicity of existence, rather than a remote heavenly deity.
Bruno also affirmed that the universe was homogeneous, made up everywhere of the four elements (water, earth, fire, and air), rather than having the stars be composed of a separate quintessence. Essentially, the same physical laws would operate everywhere, although the use of that term is anachronistic. Space and time were both conceived as infinite. There was no room in his stable and permanent universe for the Christian notions of divine Creation and Last Judgement.
Under this model, the Sun was simply one more star, and the stars all suns, each with its own planets. Bruno saw a solar system of a sun/star with planets as the fundamental unit of the universe. According to Bruno, infinite God necessarily created an infinite universe, formed of an infinite number of solar systems, separated by vast regions full of Aether, because empty space could not exist. (Bruno did not arrive at the concept of a galaxy.) Comets were part of a synodus ex mundis of stars, and not -- as other authors sustained at the time -- ephemeral creations, divine instruments, or heavenly messengers. Each comet was a world, a permanent celestial body, formed of the four elements.
Bruno's cosmology is marked by infinitude, homogeneity, and isotropy, with planetary systems distributed evenly throughout. Matter follows an active animistic principle: it is intelligent and discontinuous in structure, made up of discrete atoms. This animism (and a corresponding disdain for mathematics as a means to understanding) is the most dramatic respect in which Bruno's cosmology differs from what today passes for a common-sense picture of the universe.
During the later 16th century, and throughout the 17th century, Bruno's ideas were held up for ridicule, debate, or inspiration. Margaret Cavendish, for example, wrote an entire series of poems against "atoms" and "infinite worlds" in Poems and Fancies in 1664. Bruno's true, if partial, rehabilitation would have to wait for the implications of Newtonian cosmology.
Bruno's overall contribution to the birth of modern science is still controversial. Some scholars follow Frances Yates stressing the importance of Bruno's ideas about the universe being infinite and lacking structure as a crucial crosspoint between the old and the new. Others disagree. Others yet see in Bruno's idea of multiple worlds instantiating the infinite possibilities of a pristine, indivisible One a forerunner of Everett's Many-worlds interpretation of quantum mechanics.
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