In lieu of an abstract, here is a brief excerpt of the content:A THOMISTIC ANALYSIS OF THE GAIA HYPOTHESIS: HOW NEW IS THIS NEW LOOK AT LIFE ON EARTH? LAURA LANDEN, 0.P. Providence College Providence, Rhode Island W:HAT IS THE Gaia hypothesis? A recent article in Time magazine mentions the first major scientific conerence on Gaia, sponsored by the American Geophysical Union in 1988.1 The scientists ended their meeting by giving James Lovelock an exuberant standing ovation. Lovelock 's book Gaia: (...) A New Look at Life on Earth, first published in 1979, is now in its second edition.2 James E. Lovelock, British atmospheric chemist, introduced the Gaia hypothesis in 1975. This hypothesis emerged from his comparison of the chemical composition of Earth's atmosphere with the atmospheres of Venus and Mars. He found the contrast striking: Earth's atmosphere, hospitable to life, is markedly unlike the atmospheres of her two closest neighbors, Venus and Mars, both considered lifeless. Unsatisfied with mere chance as an explanation of this difference, Lovelock attributed a kind of active influence on the atmosphere by the whole of living organisms (called the biosphere) to effect conditions favorable for life. The following is taken from Lovelock's initial article on Gaia in 1975 : 1 Eugene Linden, "How the Earth Maintains Life," Time, November 13, 1989, p. 114. 2 See James E. Lovelock, Gaia: A New Look at Life on Earth (New York: Oxford University Press, 1987). Lovelock has published more recent work on Gaia. See James E. Lovelock, The Ages of Gaia: A Biography of Our Living Earth (New York: Bantam Books, 1990). 1 2 LAURA LANDEN, O.P. It appeared to us that the Earth's biosphere is able to control at least the temperature of the Earth's surface and the composition of the atmosphere. Prima facie, the atmosphere looked like a contrivance put together co-operatively by the totality of living systems to carry out certain necessary control functions. This led to the formulation of the proposition that living matter, the air, the oceans, the land surface were parts of a giant system which was able to control temperature, the composition of the air and sea, the pH of the soil and so on as to be optimum for survival of the biosphere. The system seemed to exhibit the behaviour of a single organism, even a living creature. One having such formidable powers deserved a name to match it; William Golding, the novelist, suggested Gaia-the name given by the ancient Greeks to their Earth goddess.• In this paper I present some of the factual evidence for the Gaia hypothesis and identify the underlying concepts of this position. Next, I note some reasons the hypothesis has encountered objections within the scientific community. Finally, I look to Aristotle and to Thomas Aquinas, as commentator, for insight as to how these apparent contrasts might find resolution. The factual evidence for Lovelock's claim lies in known measurements about the atmospheres of Venus, Earth, and Mars. In addition, he was able to construct a mathematical model of an abiological Earth. The following comparisons are of interest : GASES. PLANETS Lifeless Actual Venus Earth Mars Earth Carbon Dioxide 96.5% 98% 95% 0.03% Nitrogen 3.5% 1.9% 2.7% 79% Oxygen trace 0.0% 0.13% 21% Surface Temp °C 459 240to -53 13 340 aJames E. Lovelock and Sidney Epton, "The Quest for Gaia," New Scientist 65 (1975) : 304. 'Table taken from Lovelock, Ages, p. 9. GAIA HYPOTHESIS: A THOMIST ANALYSIS 3 Carbon dioxide, one of the " greenhouse " gases, is related to surface temperature. Nitrogen and oxygen, both highly reactive gases, are essential to life as we know it. When he first proposed the Gaia hypothesis, Lovelock himself may not have been aware of the ancient roots of the concept of earth, even the universe, as a living organism. J. Donald Hughes has traced this ancient view among the Greeks and Romans, noting the following progression : First, the Earth is the oldest goddess, supporter and nurturer of her children, human and non-human, and therefore entitled to respect and worship.... Second, the Earth is a living being of whom humans are only part. Right relationship with the Earth means that the total organism is... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:BOOK REVIEWS 351 raise questions for his thesis. Casey seems to want to suggest that our moral responses that do not fit well with the tradition of the virtues are simply the last remnants of a particular religion. But his own men· tion of the Stoics as one important source for the ' Christian ' tradition suggests that the commitments that Casey traces to Christianity-for example, to some version (...) of equality-may be more deeply rooted in the wider Western culture than he allows. And on the other hand, it is not obvious that everything that he associates with ' pagan ' virtues is necessarily incompatible with Christianity; after all, Aquinas, in addition to his extensive appropriation of the framework of the cardinal virtues, also argues that self-love is the first injunction of charity, after love of God (Summa theologiae 11-11, 26, 4). Even so, Casey's work raises important questions for contemporary moral theory. He succeeds in challenging too easy an appropriation of the tradition of the virtues by Christian ethics, and his challenge must he answered by anyone who would attempt to defend a contemporary Christian theory of the virtues. Moreover, by calling attention to the complexity and inner tensions that characterize our moral reflection, Casey reminds us that the category of ' the moral ' is not as straightforward as we sometimes take it to be. His book deserves to be widely read and carefully debated. University of Notre Dame Notre Dame, Indiana JEAN PORTER Nature and Scientific Method. Edited By DANIEL 0. DAHLSTROM. Studies in Philosophy and the History of Philosophy, vol. 22. Washington: Catholic University of America Press, 1991. Pp. 328. $48.95. William A. Wallace is a careful scholar and clear teacher of the history and philosophy of science. This volume is dedicated to him; the sixteen contributors were chosen because they have all been influenced by him, directly or indirectly. A comprehensive chronological list of Father Wallace's works, provided at the end of the book, reveals his two primary interests: contemporary issues in the philosophy of science and studies in the history of science. To reflect this, the first part of this book consists of seven essays on various contemporary issues in the philosophy of science; the second part is nine historical studies. This review will address each part in turn. Part I, "Contemporary Issues," suffers from a notable lack of unity. 352 BOOK REVIEWS Some authors directly and appropriately acknowledge the influence or inspiration of Wallace upon their contributions, the sole factor that might provide cohesion to the book as a whole. Other contributions are surprisingly devoid of any explicit connection to Wallace, save a tangential one. Wallace has provided the scholarly community with consistent and well-grounded work in the philosophy of science from a realist perspective. This realist position is shared by Rom Harre, the author of the opening essay, "Causality and Reality." Harre argues that the classical concept of causality, at least in part, survives as an ineliminable element of contemporary physics. To accomplish this, Harre distin· guishes weak from strong causality, the former as the expression of a causal mechanism, the latter as that connection stimulated by an event. This distinction is central to his Varieties of Realism. Realism is of two kinds: that which can be defined in terms of truth and falsity, and that which he terms " policy realism," which remains open to unlimited revisability of concepts, while preserving ontological categories. Having argued for these distinctions, Harre uses quantum field theory in his pursuit of a post-Humean conception of causality that transcends strict event ontology. Laudable as this pursuit may be, I wonder whether it can be achieved without reference to any conception of nature (s), a concept lamentably absent in Harre's more recent work. The realist theme is admirably pursued in Robert Sokolowski's " Explaining." Sokolowski argues for the irreducibility of names and explanations and their obvious correlates, things and causes. Form is in things; natural kinds exist; "ones" come in a splended variety reflecting the diversity of forms. Such unpopular claims are expertly defended in this essay, one of the best contributions in the book. Sokolowski also paints a fine picture of the mind... (shrink)

Thomas Aquinas studied Aristotle at the newly founded University of Naples and, as a Dominican friar, at Paris and at Cologne under Albert the Great. In addition he was well acquainted with the doctrine of the Fathers of the Church, especially Augustine, who shows elements of Neoplatonism. This dual influence upon Aquinas's thinking is apparent in his doctrine on the presence of the natural elements in a mixed body. He asserts that the elements remain virtually in the mixture by the (...) preservation of their powers of acting . This is possible, he explains, because the proper accidents of an element are caused by the elemental substantial form as formal cause, as final cause, and "in a way" as agent cause. Since efficient causality in the proper sense implies that one thing act on another as other, the substantial form of the element is said to be an efficient cause by emanation of the proper accidents . ;The proper operations of a natural substance follow upon its proper accidents, which flow spontaneously from its substantial form. Every natural substance thus exhibits a certain dynamism: it is able to perform its proper operations by reason of the accidents that emanate from its substantial form. Natural substances are secondary and proximate causes. The heavenly bodies, on the other hand, are higher causes moved by the separated substances and, ultimately, by God, the first Cause. Hence, the dynamism of natural substance, although truly present in them, derives from God by way of the heavenly bodies as effects derive from an artisan through his instruments. ;This dissertation examines Aquinas's doctrine as outlined above. The doctrine is first detailed by him and is adopted by the Thomistic schools that followed, becoming the leading doctrine on mixture until the rise of modern science. Chapter One examines the concepts of nature and of element, Chapter Two those of natural substance and of mixture. Chapter Three examines the relationship of substantial form and proper accident in both substantial and accidental changes, with emphasis on the downward motion of heavy bodies. Chapter Four is a close analysis of Aquinas's texts on mixture. This study employs two recently published research tools: the Leonine Commission's edition of the critical texts of Aquinas's philosophical opuscula , and the 49-volume Index Thomisticus. (shrink)

"Although the end be last in the order of execution, yet it is first in the order of intention." This dictum arises in Aquinas's discussion of human acts; it nonetheless comes readily to the mind of readers of Helen Lang's book. Lang's thesis is that in the Physics Aristotle wrote logoi, arguments structured around an initial thesis. This structure is seen across the books of the Physics and provides a framework in which to understand the various parts of Aristotle's science (...) of nature. Lang maintains that Aristotle's Physics establishes his science of nature, and that all logoi of the work address difficulties surrounding the scope of the subject of this science. One ought not understand the arguments in terms of the Physics as a whole; rather, each argument is to be seen in relation to the logos of which it is a part. Lang provides careful study of the arguments comprising books 2, 7, and 8, and concludes that each logos falls under an initially stated thesis. (shrink)

When asked to review a book, one's fondest hope is that it will be interesting; one dare not, even to one's self, utter the word "significant." On the surface, it appears to be a historical study of systematics, the science of biological classification; upon reading, one discovers that systematics is merely the example Atran uses to exemplify a much more penetrating question: What is the relationship of scientific knowledge and the knowledge of common sense?

This book is the English translation of Totalité et Infini, which appeared with a 1961 copyright from the same publisher. Emmanuel Levinas writes from the phenomenological tradition of Sartre, Merleau-Ponty, Husserl and Heidegger. Yet he differs in some important ways, especially from the latter two.