"The studies collected in this book are all concerned with aspects of the Platonic tradition, either in its own internal development in the Hellenistic age and the period of the Roman Empire, or with the influence of Platonism, in one or other of its forms, on other spiritual traditions, especially that of Christianity." [Book jacket].

1 Evidence-based policy requires researchers to provide the answers to ecological questions that are of interest to policy makers. To find out what those questions are in the UK, representatives from 28 organizations involved in policy, together with scientists from 10 academic institutions, were asked to generate a list of questions from their organizations. 2 During a 2-day workshop the initial list of 1003 questions generated from consulting at least 654 policy makers and academics was used as a basis for (...) generating a short list of 100 questions of significant policy relevance. Short-listing was decided on the basis of the preferences of the representatives from the policy-led organizations. 3 The areas covered included most major issues of environmental concern in the UK, including agriculture, marine fisheries, climate change, ecosystem function and land management. 4 The most striking outcome was the preference for general questions rather than narrow ones. The reason is that policy is driven by broad issues rather than specific ones. In contrast, scientists are frequently best equipped to answer specific questions. This means that it may be necessary to extract the underpinning specific question before researchers can proceed. 5 Synthesis and applications. Greater communication between policy makers and scientists is required in order to ensure that applied ecologists are dealing with issues in a way that can feed into policy. It is particularly important that applied ecologists emphasize the generic value of their work wherever possible. (shrink)

On September 27, 2016 people across the world looked down at their buzzing phones to see the AP Alert: “Baby born with DNA from 3 people, first from new technique.” It was an announcement met with confusion by many, but one that polarized the scientific community almost instantly. Some celebrated the birth as an advancement that could help women with a family history of mitochondrial diseases prevent the transmission of the disease to future generations; others held it unethical, citing medical (...) tourism and consequences for the future of the therapy. The child in question was actually born a few months earlier on April 6, 2016, but the research was published a few months later in the October edition of Fertility and Sterility. The mother carries DNA that could have given the baby Leigh Syndrome, a severe neurological disorder characterized by psychomotor regression that typically results in death between ages two and three.[1] Also known as subacute necrotizing encephalomyelopathy, Leigh Syndrome is caused by genetic mutations in mitochondrial DNA, which causes defective oxidative phosphorylation. Because people with this condition cannot re-form ATP, “demyleniation, gliosis, necrosis, spongiosis, or capillary proliferation”[2] can occur, thereby producing bilateral lesions across the central nervous system. The 36-year-old mother previously had four miscarriages and successfully birthed two children, both of whom survived less than six years due to the syndrome. For religious reasons, the mother opted for Spindle Nuclear Transfer instead of Pronuclear Transfer,[3] which many religious organizations oppose because it entails the destruction of fertilized eggs.[4] In Pronuclear Transfer, both the parent and donor egg are fertilized. The parent’s nuclear material is then removed from the egg containing mutated mitochondria and inserted into the fertilized donor egg—from which the original nuclear material has been removed and destroyed. Spindle Nuclear Transfer, on the other hand, removes the mother’s nuclear material from the egg with unhealthy mitochondria, then implants it into a donor’s egg. The newly created egg is then fertilized with the father’s sperm. This Spindle Nuclear Transfer was performed in Mexico by a team of doctors led by Dr. John Zhang, the founder of the New Hope Fertility Center in New York City. In their report, the doctors outline that five oocytes were successfully reconstituted, four of which developed into blastocysts. Only one was euploid: containing 46 XY chromosomes. Researchers then biopsied that blastocyst and found that the transmission rate of maternal mtDNA was, “5.10 ± 1.11% and the heteroplasmy level for 8993T>G was 5.73%.”[5] This indicates that at the blastocyst stage, around five percent of the mitochondria are from the original maternal egg with the mutation for Leigh Syndrome. After birth, they biopsied different tissues and found that they had an average of less than 1.60 ± 0.92% of transmitted mtDNA from the original maternal egg. The baby is reportedly doing well and the team of doctors concluded that “[h]uman oocytes reconstituted by SNT are capable of producing a healthy live birth. SNT may provide a novel treatment option in minimizing pathogenic mtDNA transmission from mothers to their babies."[6] Even when considered theoretically, Spindle Nuclear Transfer is controversial. Many doctors believe that the risks at this stage of research are too great. Dr. Trevor Stammers, a bioethicist at St. Mary’s University in London, points out: “We do not yet have a clear picture of the interaction between nuclear DNA and mitochondria.”[7] Others hold that faulty mitochondrial DNA can still be transferred during the procedure. Still more argue this technology could create problems because of germline modification.[8] Dr. Paul Knoepfler, a cell biologist at the UC Davis School of Medicine, explains: “Since this is uncharted territory and the children born from this technology would have heritable genetic changes, there are also significant unknown risks to future generations.”[9] However, proponents counter these arguments. They say the benefits outweigh the risks, as “mitochondrial replacement techniques [like Spindle Nuclear Transfer] would eliminate maternal transmission of mitochondrial disease… allowing a woman with a family history of mitochondrial diseases to ensure her children would not be affected.”[10] Additionally, experts say that no symptoms will occur if less than 20% of the transferred mitochondrial DNA is faulty.[11] And while opponents see potential germline modification as a problem, advocates answer that this could stop a family history of mitochondrial disease, which they deem a more serious concern. In this case specifically, however, there are more issues at hand. While the team of doctors did eliminate the possibility of germline modification by selecting a male embryo, there are other ethical concerns. Some argue that this case could be described as “medical tourism.” While New Hope Medical Clinic does maintain a branch in Mexico, Dr. Zhang stated that Mexico has “no rules.”[12] It is a country with underdeveloped regulations, making it difficult to confirm that doctors adhere to widely-held medical and ethical standards. Furthermore, while it is highly unlikely that the child will develop Leigh’s Syndrome, Dr. Dietrich Egli of the New York Stem Cell Foundation says the 5% mitochondrial transfer rate indicates that the technique “was not carried out well.”[13] He points to studies of embryos where the rate of mtDNA transfer was almost ten times lower. Spindle Nuclear Transfer is currently legal in the UK,[14] and many are hoping to see it legalized in the US, although Congress currently prohibits the FDA from considering applications that would entail trials in people.[15] While Dr. Zhang’s work is arguably revolutionary, many wonder if the manner in which this study was performed—in Mexico and with a high mitochondrial transfer rate—will impact the technology’s future in the US. Last week, Dr. Zhang presented the report to scientists gathered in Salt Lake City, saying that while science isn’t a race, it is “in a sense, a race for the family to find a cure, to find hope.”[16] Only time will tell if this study set back other families racing and hoping for a cure. References 1. "Leigh Syndrome." Genetics Home Reference, US National Library of Medicine, 25 Oct. 2016. Accessed 26 Oct. 2016. 2. McKusick, Victor A., and Ada Hamosh. "LEIGH SYNDROME; LS." Online Mendelian Inheritance in Man, Johns Hopkins University, 20 Jan. 2016. Accessed 30 Oct. 2016. 3. Zhang, J, H Liu, S Luo, A Chavez-Badiola, and Z Liu. "First live birth using human oocytes reconstituted by spindle nuclear transfer for mitochondrial DNA mutation causing Leigh syndrome." Fertility and Sterility, vol. 106, no. 3, 2016, pp. e375-76. Accessed 30 Oct. 2016. 4. Sample, Ian. "‘Three-parent’ babies explained: what are the concerns and are they justified?" The Guardian, 2 Feb. 2015. Accessed 30 Oct. 2016. 5. Zhang, et al. 6. Ibid. 7. Knapton, Sarah. "Three-parent babies: the arguments for and against." The Telegraph, 3 Feb. 2015. 8. Ibid. 9. Ibid. 10. "Mitochondrial Replacement Therapy FAQs." New York Stem Cell Foundation Research Institute, New York Stem Cell Foundation. Accessed 30 Oct. 2016. 11. Reardon, Sara. "‘Three-parent baby’ claim raises hopes — and ethical concerns." Nature, 28 Sept. 2016. Accessed 30 Oct. 2016. 12. Hamzelou, Jessica. "Exclusive: World’s first baby born with new “3 parent” technique." New Scientist, 27 Sept. 2016. Accessed 30 Oct. 2016. 13. Reardon, Sara. "‘Three-parent baby’ claim raises hopes — and ethical concerns." Nature, 28 Sept. 2016. Accessed 30 Oct. 2016. 14. "3-Person IVF: A Resource Page." Center for Genetics and Society, 24 Oct. 2016. Accessed 30 Oct. 2016. 15. Ritter, Malcolm. "Baby born with DNA from 3 people, first from new technique." Associated Press, 27 Sept. 2016. Accessed 30 Oct. 2016. 16. Chen, Daphne. "Controversy swirls around first three-parent baby." Deseret News, 19 Oct. 2016. Accessed 30 Oct. 2016. Works consulted Swetlitz, Ike. "FDA urged to approve ‘three-parent embryos,’ a new frontier in reproduction." STAT, 3 Feb. 2016. Accessed 30 Oct. 2016. (shrink)

Contemporary Materialism brings together the best recent work on materialism from many of our leading contemporary philosophers. This is the first comprehensive reader on the subject. The majority of philosophers and scientists today hold the view that all phenomena are physical, as a result materialism or 'physicalism' is now the dominant ontology in a wide range of fields. Surprisingly no single book, until now, has collected the key investigations into materialism, to reflect the impact it has had on current thinking (...) in metaphysics, philosophy of mind and the theory of value. The classic papers in this collection chart contemporary problems, positions and themes in materialism. At the invitation of the editors, many of the papers have been specially up-dated for this collection: follow-on pieces written by the contributors enable them to appraise the original paper and assess developments since the work was first published. The book's selections are largely non-technical and accessible to advanced undergraduates. The editors have provided a useful general introduction, outlining and contextualising this central system of thought, as well as a topical bibliography. Contemporary Materialism will be vital reading for anyone concerned to discover the ideas underlying contemporary philosophy. David Armstrong, University of Sydney; Jerry Fodor, Rutgers University, New Jersey; Tim Crane, University College, London; D. H. Mellor, Univeristy of Cambridge; J.J.C. (shrink)

This article explores Presocratic epistemology, arguing that divine revelation is replaced as a warrant for knowledge with naturalistic accounts of how and what we humans can know; thus replacing earlier Greek pessimism about knowledge with a more optimistic outlook that allows for human discovery of the truth. A review of the relevant fragments and testimonia shows that Xenophanes, Alcmaeon, Heraclitus, and Parmenides—even Pythagoras and Empedocles—all moved some distance away from the older “god-oriented” view of knowledge toward a more secular and (...) optimistic outlook. But to get some sense of the dynamics at work in this transition this article begins, as virtually every account of early Greek thought must begin, with Homer and Hesiod. (shrink)

The contributions to this special collection concern issues and problems discussed in or related to the work of Wesley C. Salmon. Salmon has long been noted for his important work in the philosophy of science, which has included research on the interpretation of probability, the nature of explanation, the character of reasoning, the justification of induction, the structure of space/time and the paradoxes of Zeno, to mention only some of the most prominent. During a time of increasing preoccupation with historical (...) and sociological approaches to under standing science (which characterize scientific developments as though they could be adequately analysed from the perspective of political movements, even mistaking the phenomena of conversion for the rational appraisal of scientific theories), Salmon has remained stead fastly devoted to isolating and justifying those normative standards distinguishing science from non-science - especially through the vindi cation of general principles of scientific procedure and the validation of specific examples of scientific theories - without which science itself cannot be (even remotely) adequately understood. In this respect, Salmon exemplifies and strengthens a splendid tradi tion whose most remarkable representatives include Hans Reichenbach, Rudolf Carnap and Carl G. Hempel, all of whom exerted a profound influence upon his own development. (shrink)