Are bacteriophage T4 and the long-nosed elephant fish valuable in their own right? Nicholas Agar defends an affirmative answer to this question by arguing that anything living is intrinsically valuable. This claim challenges received ethical wisdom according to which only human beings are valuable in themselves. The resulting biocentric or life-centered morality forms the platform for an ethic of the environment. -/- Agar builds a bridge between the biological sciences and what he calls "folk" morality to arrive at a workable (...) environmental ethic and a new spectrum--a new hierarchy--of living organisms. The book overturns common-sense moral belief as well as centuries of philosophical speculation on the exclusive moral significance of humans. Spanning several fields, including philosophy of psychology, philosophy of science, and other areas of contemporary analytic philosophy, Agar analyzes and speaks to a wide array of historic and contemporary views, from Aristotle and Kant, to E. O. Wilson, Holmes Rolston II, and Baird Callicot. The result is a challenge to prevailing definitions of value and a call for a scientifically-informed appreciation of nature. (shrink)

Does natural selection act primarily on individual organisms, on groups, on genes, or on whole species? The question of levels of selection - on which biologists and philosophers have long disagreed - is central to evolutionary theory and to the philosophy of biology. Samir Okasha's comprehensive analysis gives a clear account of the philosophical issues at stake in the current debate.

The purpose of this paper is methodological. I begin by showing the methodological frailties of both the heart and brain approach to the criteria of death used in connection with organ transplantation. I then clarify what a definition is. Finally, I propose to abandon the definition of death, and suggest a pragmatic definition of ‘explantability window’.

Metabolism is a criterion of life. Three senses are distinguished. The weakest allows strong A-Life: virtual creatures having physical existence in computer electronics, but not bodies, are classes as 'alive'. The second excludes strong A-Life but allows that some non-biochemical A-Life robots could be classed as alive. The third, which stresses the body's self-production by energy budgeting and self-equilibrating energy exchanges of some (necessary) complexity, excludes both strong A-Life and living non-biochemical robots.

I attempt to define the concept of ‘living organism’. Intuitively, a living organism is a substantial entity with a capacity for certain relevant activities. But biology has discovered that living organisms have a particular compositional or microstructural nature. This nature includes carbon-based macromolecules and water molecules. I argue that such living organisms belong to a natural kind of compound physical object, viz., carbon-based living organism. My definition of a living organism encompasses both the intuitively relevant activities and the empirically discovered (...) compositional nature. The definition is designed to deal with a variety of problem cases, e.g., viruses, proteinoid microspheres, sterile organisms, suspended animation cases, and living parts of organisms. (shrink)

The Nature of Selection is a straightforward, self-contained introduction to philosophical and biological problems in evolutionary theory. It presents a powerful analysis of the evolutionary concepts of natural selection, fitness, and adaptation and clarifies controversial issues concerning altruism, group selection, and the idea that organisms are survival machines built for the good of the genes that inhabit them. "Sober's is the answering philosophical voice, the voice of a first-rate philosopher and a knowledgeable student of contemporary evolutionary theory. His book merits (...) broad attention among both communities. It should also inspire others to continue the conversation."-Philip Kitcher, Nature "Elliott Sober has made extraordinarily important contributions to our understanding of biological problems in evolutionary biology and causality. The Nature of Selection is a major contribution to understanding epistemological problems in evolutionary theory. I predict that it will have a long lasting place in the literature."-Richard C. Lewontin. (shrink)

The mainstream rationale for equating brain death (BD) with death is that the brain confers integrative unity upon the body, transforming it from a mere collection of organs and tissues to an organism as a whole. In support of this conclusion, the impressive list of the brains myriad integrative functions is often cited. Upon closer examination, and after operational definition of terms, however, one discovers that most integrative functions of the brain are actually not somatically integrating, and, conversely, most integrative (...) functions of the body are not brain-mediated. With respect to organism-level vitality, the brains role is more modulatory than constitutive, enhancing the quality and survival potential of a presupposedly living organism. Integrative unity of a complex organism is an inherently nonlocalizable, holistic feature involving the mutual interaction among all the parts, not a top-down coordination imposed by one part upon a passive multiplicity of other parts. Loss of somatic integrative unity is not a physiologically tenable rationale for equating BD with death of the organism as a whole. (shrink)

In this accessible and fascinating book, Michel Morange draws on recent advances in molecular genetics, evolutionary biology, astrobiology, and other disciplines to find today’s answers to the question of life.

For centuries people have debated the nature of the human self. Running beneath these various arguments lie three certainties - we are born, reproduce sexually, and die. The models of spirituality which dominate the Western tradition have claimed that it is possible to transcend these aspects of human physicality by ascribing to human beings alternative traits, such as consciousness, mind and reason. By locating the essence of human life outside its basic physical features, mortality itself has come to be viewed (...) as a problem, for it appears to render human life both meaningless and absurd. Complex connections have then been made between the key features of life: sex is linked with death, and birth becomes the event that introduces the child to the world of decay - and ultimately to death itself. This fascinating book exposes the way in which the preoccupation with transcendence in both religious and secular thinking has distorted our sense of what it is to be human. At the same time, Sex and Death offers an alternative approach to the debate, based on an acceptance of mortality that emphasizes the depth and profundity possible in human life. It is an argument which will be essential reading for students of philosophy or religion, as well as the general reader interested in these debates. (shrink)

The authors propose some methodological considerations on thanatochronological estimations. They first consider the problem of the definition of death, and then they deal with the issue of the estimations of death time, that is, with the Post-Mortem Interval (PMI). As regards the first question, they note that it does not concern only the definition of death, but also the choice of a particular kind of definition of 'definition'. With reference to the second question, the authors suggest a causal model showing (...) that the presence of many causal chains must be taken into consideration. Finally they discuss what 'most convenient and reliable causal chain' means for a thanatochronologist. (shrink)