Something very startling happened in Miletus, the ancient Greek city on the modern Turkish coast, in about 600BC. That something, physicist Carlo Rovelli argues in this enjoyable and provocative little book, occurred in the interaction between two of the place’s greatest minds.
The first, Thales, one of the seven sages of ancient Greece, is often credited as the pioneer in applying deductive reasoning to geometry and astronomy; he used his mathematics, for example, to predict solar eclipses. Wondrous as this was, it was the reaction of the second man, Thales’s fellow citizen, Anaximander, 11 years his junior that, Rovelli argues, changed the world. Anaximander assimilated Thales’s ideas, treated them with due respect, but then rejected and improved on them and came up with more exact theories of his own.
That process, the idea that knowledge was something not handed down by gods or elders, but evolving, something to be quickly interrogated and built upon, set in motion, Rovelli argues, what we understand as the scientific method. If Newton characterized himself as “standing on the shoulders of giants,” then the two men near the very base of that human pyramid were Anaximander and Thales of Miletus.
In evolving the thinking of Thales, we’re told, Anaximander was not only the first human to argue that rain was caused by the observable movements of air and the heat of the sun rather than the intervention of gods — the kind of “natural wisdom” that was heretical enough to lead to the trial and death of Socrates 200 years later — he was, crucially, also the first thinker to make the case that the Earth was a body suspended in a void of space, within which the sun revolved.
This literal groundbreaking idea was, as the historian of science Karl Popper suggested, “one of the boldest, most revolutionary and most portentous ideas in the whole history of human thinking.”
Once people started seeing power as negotiable then everything else became debatable too
Rovelli, author of the bestselling Seven Brief Lessons on Physics, is himself something of a groundbreaker in advances of theoretical knowledge, with his ongoing research into quantum gravity.
In this formative book, published in English for the first time, he clearly senses Anaximander as a kindred spirit, though his claims for the Greek are based on scattered traces of evidence. We know almost nothing of Anaximander or his ideas from contemporary sources. Rovelli thus works in this book a little like an archaeologist sifting a burial site for clues, finding reference points in later historical accounts by Pliny and Aristotle and Herodotus among others. Only four lines of Anaximander’s philosophy are preserved intact. They read, in translation, a little like an outtake from TS Eliot’s Four Quartets:
“All things originate from one another, and vanish into one another/
According to necessity;
They give each other justice and recompense for injustice/
In conformity with the order of Time.”
Though part of Rovelli’s project is to grant Anaximander greater prominence in histories of civilization, he is equally interested in examining the social factors that led to this big bang moment for rational thought. He makes a polemical case that the culture in which the Greek’s wisdom of doubt was nurtured contained, for the first time, all the elements necessary for scientific advance.
These factors have an urgent relevance, he suggests, for the scientists and citizens and policymakers of today. For a start, the Miletus of 2,600 years ago was a time and place in which the ability to read and write moved beyond a limited circle of elite scribes. The effect of extending education far and wide was instantaneous. And it was no coincidence that Anaximander’s revolutionary thinking also coincided with the birth of the polis — the nascent democratic structures built on debate as to how best to govern society. Once people started seeing power as negotiable then everything else became debatable too.
“Alongside the desacralization and secularization of public life,” Rovelli argues, “which passed from the hands of divine kings to those of citizens, came the desacralization and secularization of knowledge… law was not handed down once and for all but was instead questioned again and again.”
This new freedom to doubt received wisdom was crucial in Anaximander revealing what it took Chinese stargazers — advanced in many other respects — another 2,000 years to acknowledge: that the Earth was suspended in space.
But there was one other critical factor in the new way of thinking. It was implicit in Miletus’s geography as a trading city in which Greek and Egyptian and Babylonian cultures met. Anaximander borrowed knowledge from all these traditions to build his theories.
In this, Rovelli suggests, he sends perhaps his most potent message through the ages, “one that can serve as a warning to us today.” That message, as relevant in Rovelli’s native Italy as in contemporary Britain, is this: “Each time that we — as a nation, a group, a continent or a religion — look inward in celebration of our specific identity we do nothing but lionize our own limits and sing of our stupidity.”
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