Michael Ruse

A brief, accessible history of the idea of purpose in Western thought, from ancient Greece to the present Can we live without the idea of purpose? Should we even try to? Kant thought we were stuck with purpose, and even Darwin’s theory of natural selection, which profoundly shook the idea, was unable to kill it. Indeed, teleological explanation—what Aristotle called understanding in terms of “final causes”—seems to be making a comeback today, as both religious proponents of intelligent design and some prominent secular philosophers argue that any explanation of life without the idea of purpose is missing something essential. In On Purpose, Michael Ruse explores the history of the idea of purpose in philosophical, religious, scientific, and historical thought, from ancient Greece to the present. Accessibly written and filled with literary and other examples, the book examines “purpose” thinking in the natural and human world. It shows how three ideas about purpose have been at the heart of Western thought for more than two thousand years. In the Platonic view, purpose results from the planning of a human or divine being; in the Aristotelian, purpose stems from a tendency or principle of order in the natural world; and in the Kantian, purpose is essentially heuristic, or something to be discovered, an idea given substance by Darwin’s theory of evolution through natural selection. On Purpose traces the profound and fascinating implications of these ways of thinking about purpose. Along the way, it takes up tough questions about the purpose of life and whether it’s possible to have meaning without purpose, revealing that purpose is still a vital and pressing issue.

There is something distinctively different about explanation in the biological sciences, as opposed to explanation in the physical sciences. In the former one has functional arguments, arguments making reference to what Aristotle called “final causes.” As in: “The function of the plates on the back of the Stegosaurus was to keep the body at a constant temperature.” Since the Scientific Revolution, such explanations have been forbidden in the physical sciences. Does this then mean that biology is second rate, as is suggested by many including Immanuel Kant? It is argued that the Darwinian mechanism of natural selection explains why there is need of functional explanation in biology and that once this point is grasped, there is no reason to judge biology second rate.

Evolutionary ethics - the application of evolutionary ideas to moral thinking and justification - began in the nineteenth century with the work of Charles Darwin and Herbert Spencer, but was subsequently criticized as an example of the naturalistic fallacy. In recent decades, however, evolutionary ethics has found new support among both the Darwinian and the Spencerian traditions. This accessible volume looks at the history of thought about evolutionary ethics as well as current debates in the subject, examining first the claims of supporters and then the responses of their critics. Topics covered include social Darwinism, moral realism, and debunking arguments. Clearly written and structured, the book guides readers through the arguments on both sides, and emphasises the continuing relevance of evolutionary theory to our understanding of ethics today.

The homologies of process within morphogenetic fields provide some of the best evidence for evolution—just as skeletal and organ homologies did earlier. Thus, the evidence for evolution is better than ever. The role of natural selection in evolution, however, is seen to play less an important role. It is merely a filter for unsuccessful morphologies generated by development. Population genetics is destined to change if it is not to become as irrelevant to evolution as Newtonian mechanics is to contemporary physics. (Gilbert, Opitz, and Raff 1996, 368)

Does human life have meaning? Ever since Darwin, there has been great skepticism about whether a "meaning of life" was possible outside of religious belief. Is it possible to find meaning in human life? Philosopher of science Michael Ruse examines the question of meaning in life within Darwinian views of human nature. He argues that meaning in the Darwinian age can be found if we turn to a kind of Darwinian existentialism, seeing our evolved human nature as the source of all meaning, both in the intellectual and social worlds.

In Explaining Evil four prominent philosophers, two theists and two non-theists, present their arguments for why evil exists. Taking a "position and response" format, in which one philosopher offers an account of evil and three others respond, this book guides readers through the advantages and limitations of various philosophical positions on evil, making it ideal for classroom use as well as individual study. Divided into four chapters, Explaining Evil covers Theistic Libertarianism (Richard Brian Davis), Theistic Compatibilism (Paul Helm), Atheistic Moral Realism (Erik Wielenberg) and Atheistic Moral Non-realism (Michael Ruse). It features topics including free will, theism, atheism, goodness, Calvinism, evolutionary ethics, and pain, and demonstrates some of the dominant models of thinking within contemporary philosophy of religion and ethics.

Several years ago, I was asked to participate in a forum on evolution. Flattered, I accepted, only discovering later that I was to participate in a “debate”, involving me and a scientist squaring off against two Creationists, Henry M. Morris and Duane T. Gish. The topic for discussion was which doctrine has the greatest scientific merit: organic evolution through natural processes set against the background of a very old earth, or special instantaneous appearance of all organisms, about 6000 years ago, followed shortly thereafter by a world-wide flood? I very much doubt that many minds were changed on that particular evening—the bleachers were packed with ardent Baptists bussed in from all over Wisconsin and Illinois. The 10 or so in the audience who believed in evolution went on believing in evolution. The 5000 in the audience who took the early chapters of Genesis absolutely literally went on taking the early chapters of Genesis absolutely literally. But, people's time was far from wasted. Morris and Gish got the attention they crave. Their supporters were thrilled by the sight of heretics publicly proclaiming doctrines for which they would surely earn eternal damnation. And, I learnt what a hollow sham modern day Creationism really is: crude, dogmatic, Biblical literalism, masquerading as genuine science, in order to avoid the strictures of the first amendment to the U.S. Constitution, which bars the teaching of religion in schools.

Is organicism inherently Christian-friendly, and for that matter, is mechanism inherently religion nonfriendly? They have tended to be, but the story is much more complicated. The long history of the intertwined metaphors of nature taken as an organism, versus that of nature as a machine, reveals that both metaphors have flourished in the endeavors of philosophers, scientists, and persons of faith alike. Different kinds of Christians have been receptive to both organicist and mechanistic models, just as various kinds of nonreligious scientists have been receptive to both holistic and machine metaphors. Although, it is true, organicism has been generally more attractive to persons of faith than mechanism, an overview of the rich and varied history of allegiances to these metaphors—religious and nonreligious alike—shows that debate is much more interesting and complex. A brief inspection of conversation surrounding recent scientific discoveries shows that this debate between metaphors is still very much alive today.