Nicholas Maxwell

In this paper I outline my propensiton version of quantum theory (PQT). PQT is a fully micro-realistic version of quantum theory that provides us with a very natural possible solution to the fundamental wave/particle problem, and is free of the severe defects of orthodox quantum theory (OQT) as a result. PQT makes sense of the quantum world. PQT recovers all the empirical success of OQT and is, furthermore, empirically testable (although not as yet tested). I argue that Einstein almost put forward this version of quantum theory in 1916/17 in his papers on spontaneous and induced radiative transitions, but retreated from doing so because he disliked the probabilistic character of the idea. Subsequently, the idea was overlooked because debates about quantum theory polarised into the Bohr/Heisenberg camp, which argued for the abandonment of realism and determinism, and the Einstein/Schrödinger camp, which argued for the retention of realism and determinism, no one, as a result, pursuing the most obvious option of retaining realism but abandoning determinism. It is this third, overlooked option that leads to PQT. PQT has implications for quantum field theory, the standard model, string theory, and cosmology. The really important point, however, is that it is experimentally testable. I indicate two experiments in principle capable of deciding between PQT and OQT.

In this paper I discuss four versions of the basic idea of the French Enlightenment of the 18th century, namely: To learn from scientific progress how to achieve social progress towards an enlightened world. These four versions are: 1. The Traditional Enlightenment Programme. 2. The Popperian Version of the Enlightenment Programme. 3. The Improved Popperian Enlightenment Programme. 4. The New Enlightenment Programme. The Traditional Enlightenment Programme is the version of the idea upheld by the philosophes of the French Enlightenment. It was developed throughout the 19th century and put into practice in the early 20th century with the creation of departments of social science in universities all over the world. It is however damagingly defective. The Popperian Version of the Enlightenment Programme is an improvement, but still defective. As we go down the list, from 1 and 2 to 3 and 4, each Programme improves on its predecessor, until with The New Enlightenment, which can in some respects be associated with Einstein, we arrive at a version of the idea which can genuinely help humanity make social progress towards an enlightened world.

Natural science, properly understood, provides us with the methodological key to the salvation of humanity. First, we need to acknowledge that the actual aims of science are profoundly problematic, in that they make problematic assumptions about metaphysics, values and the social use of science. Then we need to represent these aims in the form of a hierarchy of aims, which become increasingly unproblematic as one goes up the hierarchy; as result we create a framework of relatively unproblematic aims and methods, high up in the hierarchy, within which much more problematic aims and methods, low down in the hierarchy, may be improved as scientific knowledge improves. Then, we need to generalize this hierarchical, aims-and-methods-improving methodology so that it becomes fruitfully applicable to any worthwhile endeavour with problematic aims. Finally, we need to apply this methodology to the immensely problematic task of making progress towards as good a world as feasible.

In my book Understanding Scientific Progress, I argue that fundamental philosophical problems about scientific progress, above all the problem of induction, cannot be solved granted standard empiricism (SE), a doctrine which most scientists and philosophers of science take for granted. A key tenet of SE is that no permanent thesis about the world can be accepted as a part of scientific knowledge independent of evidence. For a number of reasons, we need to adopt a rather different conception of science which I call aim-oriented empiricism (AOE). This holds that we need to construe physics as accepting, as a part of theoretical scientific knowledge, a hierarchy of metaphysical theses about the comprehensibility and knowability of the universe, these theses becoming increasingly insubstantial as we go up the hierarchy. Fundamental philosophical problems about scientific progress, including the problems of induction, theory unity, verisimilitude and scientific discovery, which cannot be solved granted SE, can be solved granted AOE. In his review of Understanding Scientific Progress, Moti Mizrahi makes a number of criticisms, almost all of which are invalid in quite elementary ways.

The crisis of our times is science in a world without wisdom. The immense intellectual success of modern science and technology have given some of us unprecedented powers to act, which has led to all the great benefits of the modern world, and to the grave global crises we now face. Before modern science, we lacked the power to do too much damage to ourselves or the planet; now we have science, wisdom has become, not a private luxury but a public necessity. Unless we learn to become a bit wiser, sooner or later we will destroy ourselves. But how can we learn to become wiser? We can learn from the last place many would look - namely science! We can learn from scientific progress how to achieve social progress towards a wiser world. This is in fact an old idea. It goes back to the 18th century French Enlightenment. But, in developing the idea, the philosophes of the Enlightenment made three gross blunders. They failed to capture correctly the nature of the progress-achieving methods of science; they failed to generalize these methods properly; and, most disastrously of all, they applied their misconstrued scientific method, not to the social world directly, not to the task of making social progress towards an enlightened world, but instead to the task of improving knowledge of social phenomena, to the task of developing social science. This botched version of the profound Enlightenment idea was developed throughout the 19th century, and built into universities in the early 20th century with the creation of disciplines of social science. As a result, academic inquiry today is a botched version of what we need. Instead of giving priority to problems of living, and devoting itself to helping humanity acquire a bit more wisdom, academia today devotes itself to the pursuit of knowledge. That is the key disaster of our times. Our institutions of learning seek knowledge, but fail disastrously to devote themselves to helping humanity acquire a bit more wisdom. If the world is to acquire global wisdom, it needs institutions of learning rationally devoted to the task. As a matter of supreme urgency, we need to bring about a revolution in academia so that the basic task becomes, not just to acquire knowledge, but to seek and promote social wisdom.

We face grave global problems. One might think universities are doing all they can to help solve these problems. But universities, in successfully pursuing scientific knowledge and technological know-how in a way that is dissociated from a more fundamental concern with problems of living, have actually made possible the genesis of all our current global problems. Modern science and technology have led to modern industry and agriculture, modern medicine and hygiene, modern armaments, which in turn have led to much that is good, but also to habitat destruction, extinction of species, population growth, the lethal character of modern war, and the impending disasters of climate change. We urgently need to bring about a revolution in universities so that they put problems of living at the heart of the academic enterprise and take, as their basic task, to help humanity learn how to make progress towards as good a world as possible.

Most scientists and philosophers of science recognize that, when it comes to accepting and rejecting theories in science, considerations that have to do with simplicity, unity, symmetry, elegance, beauty or explanatory power have an important role to play, in addition to empirical considerations. Until recently, however, no one has been able to give a satisfactory account of what simplicity (etc.) is, or how giving preference to simple theories is to be justified. But in the last few years, two different but related accounts have appeared, both of which address the above issues. On the one hand, James McAllister has argued that aesthetic criteria in science reflect scientists' judgements about what kind of theory is most likely to be empirically successful, based on the relative empirical success and failure of different kinds of theories in the past. Scientists employ what McAllister dubs "the aesthetic induction". On the other hand, I have argued that we need to see science as making a hierarchy of metaphysical assumptions about the comprehensibility and knowability of the universe, these assumptions asserting less and less as one ascends the hierarchy. One of the more substantial of these assumptions is that the universe is physically comprehensible. The key non-empirical feature a body of fundamental theories in physics must possess to be acceptable is unity. The better such a body of theory exemplifies the metaphysical thesis that the universe is physically comprehensible, in the sense that it has a unified dynamic structure, so the more acceptable such a body of theory is, from this standpoint. This affects not just theoretical physics, but the whole of natural science. In this paper I compare and contrast, and try to assess impartially the relative merits of, these two views.

Unlike almost all other philosophers of science, Karl Popper sought to contribute to natural philosophy or cosmology – a synthesis of science and philosophy. I consider his contributions to the philosophy of science and quantum theory in this light. There is, however, a paradox. Popper’s most famous contribution – his principle of demarcation – in driving a wedge between science and metaphysics, serves to undermine the very thing he professes to love: natural philosophy. I argue that Popper’s philosophy of science is, in this respect, defective. Science cannot proceed without making highly problematic metaphysical assumptions concerning the comprehensibility and knowability of the universe. Precisely because these assumptions are problematic, rigour requires that they be subjected to sustained critical scrutiny, as an integral part of science itself. Popper’s principle of demarcation must be rejected. Metaphysics and philosophy of science become a vital part of science. Natural philosophy is reborn. A solution to the problem of what it means to say a theory is unified is proposed, a problem Popper failed to solve. In The Logic of Scientific Discovery, Popper made important contributions to the interpretation of quantum theory, especially in connection with Heisenberg's uncertainty relations. Popper's advocacy of natural philosophy has important implications for education

We are in a state of impending crisis. And the fault lies in part with academia. For two centuries or so, academia has been devoted to the pursuit of knowledge and technological know-how. This has enormously increased our power to act which has, in turn, brought us both all the great benefits of the modern world and the crises we now face. Modern science and technology have made possible modern industry and agriculture, the explosive growth of the world’s population, global warming, modern armaments and the lethal character of modern warfare, destruction of natural habitats and rapid extinction of species, immense inequalities of wealth and power across the globe, pollution of earth, sea and air, even the aids epidemic (aids being spread by modern travel). All these global problems have arisen because some of us have acquired unprecedented powers to act, via science and technology, without also acquiring the capacity to act wisely. We urgently need to bring about a revolution in universities so that the basic intellectual aim becomes, not knowledge merely, but rather wisdom – wisdom being the capacity to realize what is of value in life, for oneself and others, thus including knowledge and technological know-how, but much else besides. The revolution we require would put problems of living at the heart of the academic enterprise, the pursuit of knowledge emerging out of, and feeding back into, the fundamental intellectual activity of proposing and critically assessing possible actions, policies, political programmes, from the standpoint of their capacity to help solve problems of living. This revolution would affect almost every branch and aspect of academic inquiry.

This paper argues that a view of science, expounded and defended elsewhere, solves the problem of induction. The view holds that we need to see science as accepting a hierarchy of metaphysical theses concerning the comprehensibility and knowability of the universe, these theses asserting less and less as we go up the hierarchy. It may seem that this view must suffer from vicious circularity, in so far as accepting physical theories is justified by an appeal to metaphysical theses in turn justified by the success of science. But this is rebutted. A thesis high up in the hierarchy asserts that the universe is such that the element of circularity, just indicated, is legitimate and justified, and not vicious. Acceptance of the thesis is in turn justified without appeal to the success of science. It may seem that the practical problem of induction can only be solved along these lines if there is a justification of the truth of the metaphysical theses in question. It is argued that this demand must be rejected as it stems from an irrational conception of science.

The central thesis of this book is that we need to reform philosophy and join it to science to recreate a modern version of natural philosophy; we need to do this in the interests of rigour, intellectual honesty, and so that science may serve the best interests of humanity. Modern science began as natural philosophy. In the time of Newton, what we call science and philosophy today – the disparate endeavours – formed one mutually interacting, integrated endeavour of natural philosophy: to improve our knowledge and understanding of the universe, and to improve our understanding of ourselves as a part of it. Profound discoveries were made, indeed one should say unprecedented discoveries. It was a time of quite astonishing intellectual excitement and achievement. And then natural philosophy died. It split into science on the one hand, and philosophy on the other. This happened during the 18th and 19th centuries, and the split is now built into our intellectual landscape. But the two fragments, science and philosophy, are defective shadows of the glorious unified endeavour of natural philosophy. Rigour, sheer intellectual good sense and decisive argument demand that we put the two together again, and rediscover the immense merits of the integrated enterprise of natural philosophy. This requires an intellectual revolution, with dramatic implications for how we understand our world, how we understand and do science, and how we understand and do philosophy. There are dramatic implications, too, for education. And it does not stop there. For, as I show in the final chapter, resurrected natural philosophy has dramatic, indeed revolutionary methodological implications for social science and the humanities, indeed for the whole academic enterprise. It means academic inquiry needs to be reorganized so that it comes to take, as its basic task, to seek and promote wisdom by rational means, wisdom being the capacity to realize what is of value in life, for oneself and others, thus including knowledge, technological know-how and understanding, but much else besides. The outcome is institutions of learning rationally designed and devoted to helping us tackle our immense global problems in increasingly cooperatively rational ways, thus helping us make progress towards a good world – or at least as good a world as possible.

Once it is appreciated that it is not possible for an all-powerful, all-knowing, all-loving God to exist, the important question arises: What does exist that is closest to, and captures the best of what is in, the traditional conception of God? In this paper I set out to answer that question. The first step that needs to be taken is to sever the God-of-cosmic-power from the God-of-cosmic-value. The first is Einstein’s God, the underlying dynamic unity in the physical universe which physics seeks to depict by means of a true, unified, physical “theory of everything”. Science has already achieved some theoretical knowledge of this God-of-cosmic-power. The second is what is of most value in our human world, and in the world of sentient life more generally. Having cut God in half in this way, our fundamental problem, intellectual and practical, becomes: How can the God-of-cosmic-value (as it is represented on earth at least) exist and best flourish within the God-of-cosmic-power? Or, in other words: How can what is of value associated with human life – and sentient life more generally – exist and best flourish within the physical universe? Clearly acknowledging that this is our fundamental problem, in academic inquiry, and in all that we do, might help what is of value in life to flourish rather better than it does at present.

Universities today betray both reason and humanity. They are still dominated by the idea, inherited from the past, that the best way the academic enterprise can help promote human welfare is, in the first instance, to pursue the intellectual aim of acquiring knowledge. First, knowledge and technological know-how are to be acquired; then, secondarily, they can be applied to help solve social problems. But academic inquiry conducted in this way – knowledge-inquiry as it may be called – violates the most elementary rules of reason that one can think of and, as a result, betrays the interests of humanity. We need a revolution in academia, one which puts problems of living at the heart of academic inquiry, and takes the basic aim to be to seek and promote wisdom, construed to be the capacity to realize what is of value in life, for oneself and others, thus including knowledge, but much else besides.

Neurosis can be interpreted as a methodological condition which any aim-pursuing entity can suffer from. If such an entity pursues a problematic aim B, represents to itself that it is pursuing a different aim C, and as a result fails to solve the problems associated with B which, if solved, would lead to the pursuit of aim A, then the entity may be said to be "rationalistically neurotic". Natural science is neurotic in this sense in so far as a basic aim of science is represented to be to improve knowledge of factual truth as such (aim C), when actually the aim of science is to improve knowledge of explanatory truth (aim B). Science does not suffer too much from this neurosis, but philosophy of science does. Much more serious is the rationalistic neurosis of the social sciences, and of academic inquiry more generally. Freeing social science and academic inquiry from neurosis would have far reaching, beneficial, intellectual, institutional and cultural consequences.

There are these two absolutely basic problems: to learn about the universe and ourselves as a part of the universe, and to learn how to create a civilized world. Essentially, we have solved the first problem. We solved it when we created modern science. That is not to say that we know everything that is to be known, but we created a method for improving our knowledge about the world. But we haven't solved the second problem. And to solve the first problem without solving the second problem is very, very dangerous. The crisis is this: the crisis of having science without civlization.

We are in a state of impending crisis. And the fault lies in part with academia. For two centuries or so, academia has been devoted to the pursuit of knowledge and technological know-how. This has enormously increased our power to act which has, in turn, brought us both all the great benefits of the modern world and the crises we now face. Modern science and technology have made possible modern industry and agriculture, the explosive growth of the world’s population, global warming, modern armaments and the lethal character of modern warfare, destruction of natural habitats and rapid extinction of species, immense inequalities of wealth and power across the globe, pollution of earth, sea and air, even the AIDS epidemic (AIDS being spread by modern travel). All these global problems, involving preventable deaths of millions, have arisen because some of us have acquired unprecedented powers to act without acquiring the capacity to act wisely. We urgently need to bring about a revolution in universities so that the basic intellectual aim becomes, not knowledge merely, but rather to help humanity acquire the capacity to resolve conflicts and problems of living in more cooperatively rational ways. The revolution we need would affect every branch and aspect of academic inquiry. The basic intellectual task of academia would be to articulate our problems of living (personal, social and global) and propose and critically assess possible solutions, possible actions. This would be the task of social inquiry and the humanities. Tackling problems of knowledge would be secondary. Social inquiry would be at the heart of the academic enterprise, intellectually more fundamental than natural science. On a rather more long-term basis, social inquiry would be concerned to help humanity build cooperatively rational methods of problem-solving into the fabric of social and political life, so that we may gradually acquire the capacity to resolve our conflicts and problems of living in more cooperatively rational ways. Natural science would change to include three domains of discussion: evidence, theory, and aims – the latter including discussion of metaphysics, values and politics. Academia would actively seek to educate the public by means of discussion and debate. These changes all come from demanding that academia cure its current damaging structural irrationality, so that reason – the authentic article – may be devoted to promoting human welfare.

The Urgent Need for an Intellectual Revolution For much of my working life (from 1972 onwards) I have argued, in and out of print, that we need to bring about a revolution in the aims and methods of science – and of academic inquiry more generally. Instead of giving priority to the search for knowledge, academia needs to devote itself to seeking and promoting wisdom by rational means, wisdom being the capacity to realize what is of value in life, for oneself and others, wisdom thus including knowledge, understanding and technological know-how, but much else besides. A basic task ought to be to help humanity learn how to create a better world.

The crisis of our times is that we have science without wisdom. This is the crisis behind all the others. Population growth, the terrifyingly lethal character of modern war and terrorism, immense differences of wealth across the globe, annihilation of indigenous people, cultures and languages, impending depletion of natural resources, destruction of tropical rain forests and other natural habitats, rapid mass extinction of species, pollution of sea, earth and air, thinning of the ozone layer, above all global warming - even the aids epidemic: all these relatively recent crises have been made possible by modern science and technology. Indeed, in a perfectly reasonable sense of "cause", they have been caused by modern science and technology. An essential step we need to take, in order to tackle these global problems more effectively, intelligently and humanely than we have done so far, is to create a new kind of academic inquiry which puts problems of living, and the pursuit of wisdom, at the heart of the enterprise.

This article consists of my replies to criticisms of and comments on a talk I gave at the Polish Academy of Sciences, Warsaw, Poland, in 2011. My original talk was called "The Menace of Science without Civilization: From Knowledge to Wisdom": for the text. In my talk I argued that our extraordinarily successful pursuit of scientific knowledge and technology has vastly increased our power to act, without increasing our power to act wisely. This puts us into a situation of unprecedented danger, and is the root cause of almost all our current global problems, from climate change, population growth, to the lethal character of modern war. We urgently need to bring about a revolution in academic inquiry so that we may have what we so urgently need: a kind of inquiry rationally designed and devoted to helping us make progress towards a better world. Five authors criticized my thesis. Unfortunately, they mostly misunderstood the nature of my thesis and argument, as I point out in the present article.

For over 30 years I have argued, in and out of print that, for both intellectual and humanitarian reasons, we urgently need a revolution in the aims and methods of academic inquiry. Instead of giving priority to the search for knowledge, academia needs to devote itself to seeking and promoting wisdom by rational means, wisdom being the capacity to realize what is of value in life, for oneself and others. Wisdom thus includes knowledge but much else besides. A basic task of academia would be to help humanity learn how to create a better world. Now I find the revolution is underway – entirely independent of my own efforts to promote it. During the last ten to twenty years, all sorts of changes have taken place in academia that amount to putting aspects of wisdom-inquiry into practice – even if in complete ignorance of my work. Perhaps the most significant steps are the creation of departments, institutions and research centres concerned with social policy, with problems of environmental degradation, climate change, poverty, injustice and war, and with such matters as medical ethics and community health. Nevertheless, the revolution is happening with agonizing slowness, in a dreadfully muddled and piecemeal way. It needs academics and non-academics to wake up to what is going on – or what needs to go on – to help give direction, coherence and a rationale to this nascent revolution from knowledge to wisdom.