How the Einsteinian revolution can be understood as the result of a long-term evolution of science
The revolution that emerged from Albert Einstein’s work in the early twentieth century transformed our understanding of space, time, motion, gravity, matter, and radiation. Beginning with Einstein’s miracle year of 1905 and continuing through his development of the theory of general relativity, Einstein spurred a revolution that continues to reverberate in modern-day physics. In The Einsteinian Revolution , Hanoch Gutfreund and Jürgen Renn trace the century-long transformation of classical physics and argue that the revolution begun by Einstein was in fact the result of a long-term evolution. Describing the origins and context of Einstein’s innovative research, Gutfreund and Renn work to dispel the popular myth of Einstein as a lone genius who brought about a revolution in physics through the power of his own pure thought. We can only understand the birth of modern physics, they say, if we understand the long history of the evolution of knowledge.
Gutfreund and Renn outline the essential structures of the knowledge system of classical physics on which Einstein drew. Examining Einstein’s discoveries from 1905 onward, they describe the process by which new concepts arose and the basis of modern physics emerged. These transformations continued, eventually resulting in the establishment of quantum physics and general relativity as the two major conceptual frameworks of modern physics―and its two unreconciled theoretical approaches. Gutfreund and Renn note that Einstein was dissatisfied with this conceptual dichotomy and began a search for a unified understanding of physics―a quest that continued for the rest of his life.
Jürgen Renn is a director at the Max Planck Institute for the History of Science in Berlin, where, together with his group, he researches structural changes in systems of knowledge. His books include, with Hanoch Gutfreund, The Formative Years of Relativity: The History and Meaning of Einstein's Princeton Lectures and The Road to Relativity: The History and Meaning of Einstein's "The Foundation of General Relativity".
I started this book fearing that it would be just another tale of Einstein’s brilliance, the singular and incredible leaps in imagination that he took as a lowly patent clerk and of the enormous impact of his work. However, the book offered much more, proving far more intriguing. There are countless books out there (many of them very good) that detail his life and his works, but that see him very much as an isolated person, overturning the centuries old ideas of science and philosophy with paradigm shift after paradigm shift. This book paints a different picture in an incredibly compelling manner.
The book is really about the nature of science as Einstein found it, of the ideas and results that were already putting pressures on classical physics, and this is paralleled with the Copernican revolution, where the epicyclic models were grinding to a halt under their own complexity, and it took for someone to reimagine the results in a different light to see a much simpler and more elegant truth.
The book does have biographical aspects, which are necessary to paint the scene of the type of person that Einstein was, but it is less about his personality than about his depth of understanding of many areas of physics that were butting up against each other towards the end of the 19th century. Already we had a Lorentzian picture of relativity which gave ingredients which Einstein could use for the special theory of relativity. Under Lorentz’s picture this was an attempt to create a theory of different inertial frames that worked with the ether and could account for results of electrodynamics, however this treated fields and matter in fundamentally different ways.This approach was not truly unifying, and while it appeared compatible with experimental results, it rendered the classical theory less elegant. Einstein’s brilliance lay in extending these ideas into a cohesive unifying framework and simply following the path of consequences, leading to the formulation of special relativity.
Similarly, with quantum theory, Planck already had his model of blackbody radiation, which had quantised matter, but left the electromagnetic field as purely classical. It was again the taking of these ideas and pushing them to their logical conclusions that lead Einstein to take the seeds of quantum theory that Planck had created and sow them in the right ground.
Similarly, in his 1905 work on Brownian motion, which provided the first definitive evidence of atoms of fixed size and the equivalence of matter and energy, demonstrated that these were not spontaneous ideas emerging from the ether (or its absence) but rather the result of a profound understanding of the existing physics landscape, recognizing its emerging fractures.
The second half of the book goes on to detail his progress from the Special to the General Theory of Relativity, letting us see again how his mind was able to work with ideas which were nascent at the time, particularly in mathematics, with the help of his friend Marcel Grossmann but in conjunction with the likes of David Hilbert, Levi-Civita and Ricci-Curbastro who had laid the groundwork of differential geometry.
The book does not downplay Einstein’s brilliance, but puts it within the context of the time, and sees the revolutions that took place as in a sense releasing the pressure on ideas which were reaching their breaking point. It took someone who both had an incredible imagination but also a deep understanding of all ideas that were already on the table and of how they fit together to create what we now see as such ground-breaking and awe-inspiring revolutions.
Overall, the book is beautifully written and embraces its nature as an academic text. I would recommend this book for anyone who already has a reasonably sense of quantum physics and relativity, though even those who don’t are likely to get a good sense of why it’s so important to revisit the cultural and historical roots of such a profound set of ideas.
I really enjoyed learning about Einstein’s process developing his revolutionary theories. It was interesting just for the actual historical story, there’s plenty of legend around Einstein’s life/process, it was interesting to read the facts. I also liked the incorporation of their broad view of scientific revolutions and the “Copernicus Revolution” idea. Sometimes the physics details were going over even my head, especially concerning general relativity, but I’d still recommend it to people interested in physics and science in general.
In this masterfully written book with a delightful font (Arno), Jürgen Renn and Hanoch Gutfreund put Einstein and his monumental contributions to science in their historical contexts, making the case that Einsteinian science was more of an evolution of existing systems of knowledge than a complete break with the past, as revolutionary as they seemed. The (grand) masters of classical physics, such as Hendrik Antoon Lorentz and Henri Poincare came close to discovering certain aspects of special relativity, namely the Lorentz transformations or the relativistic addition of velocities, it took Einstein to put them all and more in a complete theoretical package, representing a true conceptual transformation in the history of physics.
Indeed, while Einstein typically, though not always, worked alone, the notion that he was a lone genius is historically inaccurate, for he, like virtually everyone else in the history of science, stood on the shoulders of those who came before him. What made Einstein unique was not just superlative physical insights and persistence but also a willingness to cross the borderlines between the subdivisions of physics. This, then, was the "secret sauce" of his success. The last ingredient is especially relevant at a time when (narrow) specialization is the norm. It is important to remember that the boundaries between the different branches of science are purely artificial. We invented them for our own convenience, to keep things manageable. But Nature could not care less if we were studying astronomy or zoology. Interdisciplinary collaboration and research can be rather fruitful, as Einstein's works, especially in the early years clearly showed. Today, gravitational physics, in which general relativity remains the standard bearer, is benefiting enormously from this approach. Since after the Second World War, especially from the 1960s onward, it has attracted the imagination of not just theoretical physicists and mathematicians but also astronomers, astrophysicists, computational physicists, and experimental physicists and engineers of various specialties. The renaissance of relativity has not ended.
And so, the adventures continue. Science continues to make progress.
One of the hidden, because so obvious, charms of this volume is the collection of blurbs on the back cover. An industrious if demented individual could turn over half a library without finding a book with four such trenchant and accurate comments on the cover. Goodreads seems to be committed to the concept that books are written by single individuals; this is evident here, where credit is given to Professor Doctor Renn while his co-author, Professor Hanoch Gutfreund, is nowhere to be found. Ach, such is the life of writers and academics.
What the authors have given us, as admirably explained on the back cover, is an explanation of how Albert Einstein came to develop his theory of relativity and other phenomena not, as many have been led to believe, as an isolated genius working in obscurity, but as a social creature bolstered by many others from disparate disciplines. Indeed, the array of fields Prof. Einstein contributed to is almost as alarming as the revolution in physics he precipitated.
One of the mini-stories offered concerns Sir Arthur Eddington whose expedition to photograph an eclipse has recent echoes with us in the Eastern United States. Prof. Eddington showed, for the first time, light being bent as it passed by a star (our Sun) on its way to us. This cruise of his produced worldwide press coverage. And when the English explorer's data was explained by a German Jew who held a Swiss passport---this was immediately after WW 1---the furor made Einstein an internationally renown figure (pg 19). With this nugget, the authors send us on our way to historical clarity with clear, superbly edited prose.