Pythagoras

His Lives and the Legacy of a Rational Universe

Kitty Ferguson

• Verlag: Icon Books
• Jahr: 2011
• ISBN:
  9781848312500
• Thema: Mathematics
• Thema: History & Philosophy of Mathematics

This is the story of Pythagoras and the Pythagoreans, whose insights transformed the ancient world and still inspire the realms of science, mathematics, philosophy and the arts. Einstein said that the most incredible thing about our universe was that it was comprehensible at all. As Kitty Ferguson explains, Pythagoras had much the same idea - but 2, 500 years earlier. Though known by many only for his famous Theorem, in fact the pillars of our scientific tradition - belief that the universe is rational, that there is unity to all things, and that numbers and mathematics are a powerful guide to truth about nature and the cosmos - hark back to the convictions of this legendary scholar. Kitty Ferguson brilliantly evokes Pythagoras' ancient world of, showing how ideas spread in antiquity, and chronicles the incredible influence he and his followers have had on so many extraordinary people in the history of Western thought and science. 'Pythagoras' influence on the ideas, and therefore on the destiny, of the human race was probably greater than that of any single man before or after him' - Arthur Koestler.

PART I

Sixth Century B.C.

CHAPTER 0

‘At the hinge of legend and history’

On the Aegean island of Samos, on the narrow arm of the harbour that juts farthest out to sea, there is a stark, skeletal structure. Immense shards of iron look as though they have fallen from the sky in the shape of a huge right triangle. One end of the diagonal has buried itself in the ground. Instead of a vertical line rising from the right angle, there is the statue of a man – lean, elongated, taller than life. He is reaching up with his right arm as though to conjure down the broken piece of iron that, if it were complete, would form the vertical of the triangle. Between his fingers and its lowest tip is a gap, such a gap as separates the finger of God from the finger of Adam in the ceiling of the Sistine Chapel. The triangle is not this man’s creation. It is as old as the universe, as old as truth.

There is no argument but that this monument captures Western civilisation’s image of Pythagoras, a native son of this magical island. The triangle is his classic symbol . . . but, more authentically, he has become the icon of an unexplained but undeniable gift: the ability of human minds to connect with the bedrock rationality of the universe.

Behind all the veneration of Pythagoras and the undeniably great heritage attributed to him and his followers, behind the assumptions about his accomplishments, the uncritical early biographies, the legends, the debunkings, the forgeries, there was a real person. Who he was, actually – except for illusive wisps of information – is lost in the past.

Pythagoras and the devotees who surrounded him during his lifetime were obsessively secretive. As far as is known, they left no writings at all. There is no scroll, no text, no fragment, no firsthand account by any witness, no artefact for archaeologists to scrutinise, no tablet to decipher. If such ever existed, they no longer did by late antiquity. The earliest written evidence about Pythagoras himself that modern scholarship accepts as genuine consists of six short fragments of text from the century after his death, found not in their originals but in works of ancient authors who either saw the originals or were quoting from earlier secondary copies. The Pythagorean doctrine of reincarnation is the subject of three of these fragments, two of which also mention Pythagoras’ courage, knowledge, and wisdom. Two others are scornful and derogatory. The sixth is a backhanded compliment in the middle of an unrelated story by the historian Herodotus, who termed Pythagoras ‘by no means the feeblest of the Greek sages’. None name any discoveries, pinpoint any quotable wisdom or scientific contribution, or give biographical details. Though some treatises about Pythagoras tell you that his contemporaries seem not to have been aware of his existence, that was not the case, for all these fragments assume that Pythagoras was a famous man whose name readers would recognise. That, of course, has continued to be true for two thousand, five hundred years, in spite of the fact that as early as the time of Plato, in the fourth century B.C., Pythagoras and the Pythagoreans were already a mystery, and today they are often described as ‘an ancient cult about whom almost nothing is known’.

Those six early fragments are not, however, the full extent of the available evidence about the Pythagoreans – those men and women who followed Pythagoras during his lifetime and who in later generations went on trying to live out his teachings. Philolaus, a not-so-secretive Pythagorean, wrote a book fifty to seventy-five years after Pythagoras’ death, revealing that early Pythagoreans proposed that the Earth moves and is not the centre of the cosmos. Plato knew Pythagoreans in the fourth century B.C., was strongly influenced by the idea of the role of numbers in nature and creation, and tried to incorporate what he thought of as a Pythagorean curriculum – the ‘quadrivium’ – at his Academy in Athens. Aristotle and his pupils wrote extensively about the Pythagoreans a few years later, relying on earlier material that still existed then but has since vanished, and on carefully chosen living spokesmen for the oral tradition, before a time when that became contaminated by forgeries. This present book will return frequently to the issues of evidence and how it was and is evaluated. It seems no other group has ever made such an effort to remain secret, or succeeded so well, as the Pythagoreans did – and yet become so celebrated and influential over such an astonishingly long period of time.

In an attempt to cut through the multilayered veil of twenty-five centuries that hangs between us and whatever happened on the ancient isle of Samos and in the harbour city of Croton, sceptical twentieth-century historians insisted on discarding all but the most concrete, ‘hard’ historical evidence. Though certainly they were right to believe a corrective was needed, they arguably pruned too much, applying standards of their own time to an era for which it was inappropriate and even misleading to do so. The tiny ‘core of truth’ left after discounting all folk wisdom, semi-historic tradition, legend or what might be only legend, and blatant forgeries and inventions can be stated in one paragraph:

Pythagoras of Samos left his native Aegean island in about 530 B.C. and settled in the Greek colonial city of Croton, on the southern coast of Italy. Though the date of his birth is not certain, he was probably by that time about forty years old and a widely experienced, charismatic individual. In Croton, he had a significant impact as a teacher and religious leader; he taught a doctrine of reincarnation, became an important figure in political life, made dangerous enemies, and eventually, in about 500 B.C., had to flee to another coastal city, Metapontum, where he died. During his thirty years in Croton, some of the men and women who gathered to sit at his feet began, with him, to ponder and investigate the world. While experimenting with lyres and considering why some combinations of string lengths produced beautiful sounds and others did not, Pythagoras, or others who were encouraged and inspired by him, discovered that the connections between lyre string lengths and human ears are not arbitrary or accidental. The ratios that underlie musical harmony make sense in a remarkably simple way. In a flash of extraordinary clarity, the Pythagoreans found that there is pattern and order hidden behind the apparent variety and confusion of nature, and that it is possible to understand it through numbers. Tradition has it that, literally and figuratively, they fell to their knees upon discovering that the universe is rational. ‘Figuratively’, at least, is surely accurate, for the Pythagoreans embraced this discovery to the extent of allowing numbers to lead them, perhaps during Pythagoras’ lifetime and certainly shortly after his death, to some extremely far-sighted and also some off-the-wall, premature notions about the world and the cosmos.

One might assume that the above paragraph is a summary merely touching the highlights of what is known about events in sixth-century B.C. Croton, but it is, in fact, all that is known. Though you and I might wish to ask many more questions, the answers are irretrievably lost. No one can claim to tell how Pythagoras and his followers arrived at the religious and philosophical doctrines they espoused, or even precisely what these were . . . or in what specific ways Pythagoras and his followers influenced and changed the culture and civic structure of Croton and the surrounding area . . . or whether whatever caused Pythagoras and his followers to make such volatile enemies was something we would condemn or applaud today . . . or whether the great discovery in music of the power of numbers to reveal truth about the universe was made by Pythagoras himself. It may come as a particular surprise that there has been no mention of a Pythagorean triangle or a Pythagorean theorem in this ‘core of knowledge’ about Pythagoras.

While historians in the twentieth century were clearing the deck, archaeologists were also playing a role in bringing down the legendary Pythagoras. They uncovered evidence that the ‘Pythagorean theorem’ (or the ‘Pythagorean rule’, for ‘theorem’ implies a concept that was unrecognised this early) was known long before Pythagoras. Those revelations were not the end of the discussion, for with regard to such knowledge, there is more to be answered than the question of who had it ‘first’. The way it passed – or may have passed – or failed to pass – from society to society and era to era is a complex, fascinating subject. Was it known and then lost? Or only partly lost? Were there separate discoveries? Equally significant is the way different societies and eras regarded such knowledge, what meaning they attached to it. Was it useful for surveying and building? Was it valued for the way it helped produce beautiful design? Was it considered holy? Was it something to be shared, or to be held in strictest secrecy, or taught only to a few? Was it intriguing in and of itself? Or did it imply something about – or raise questions about – the nature of all being? Did it buttress, or tear down, a trust in the power of numbers to uncover secret truth about the universe? Was there a ‘proof’? What constituted ‘proof’ before the modern concept of ‘proof’? With questions like those, the origin of the ‘Pythagorean theorem’ becomes an extremely interesting and complicated issue.

Numbers and mathematics had been in use for eons before Pythagoras was born, sometimes with more sophisticated understanding than his and his followers’. Their insight in the realm of music was extraordinary in a different way – different from the practical use of numbers or from an artist’s appreciation for a beautiful geometric figure. Different even from the more abstract thinking of an early Babylonian teacher or student who found it an interesting exercise to do the maths for a grain pile far larger than could ever be constructed. Imagine a carpenter looking at the hammer and chisel that he holds in his hands, that he has been taking for granted as a useful part of his daily work, and in an instant of dumbfounded recognition seeing that he holds the keys to unlock the doorway to vast hidden knowledge. That was what numbers became for the Pythagoreans and, through them, for the future. With this fresh appreciation – indeed, veneration – of the power of numbers, Pythagoras and his followers made one of the most profound and significant discoveries in the history of human thought. They stood at the sort of threshold that humanity has crossed only a few times. This particular door would not close again.

The brutally pared-down picture of Pythagoras and the events of his life offered by the twentieth century was no more satisfactory a representation than the one that overcredulous earlier centuries had accepted. All that could be said for it was that it was probably not wrong. But, for me, it has caused a dramatic refocusing of my attention onto the enormous, rich, multilayered, continuously reimagined story of ‘Pythagoras’ – as seen separately from the life and person of the historical Pythagoras. That is the reason this book ends in the twenty-first century rather than in antiquity.

Amazingly it is the uncertainty about what really occurred and who Pythagoras really was and what he accomplished that has allowed something astounding to happen through the centuries. One truly powerful idea did come authentically from Pythagoras and his earliest followers – the recognition that numbers are a pathway from human ignorance to an understanding of the deepest mysteries of a universe that on some profound level makes perfect sense and is all of a piece. That vision has been a premier guide in the development of science and remains so today. However, the s...