Frank E. Zachos offers a comprehensive review of one of today's most important and contentious issues in biology: the species problem. After setting the stage with key background information on the topic, the book provides a brief history of species concepts from antiquity to the Modern Synthesis, followed by a discussion of the ontological status of species with a focus on the individuality thesis and potential means of reconciling it with other philosophical approaches. More than 30 different species (...) concepts found in the literature are presented in an annotated list, and the most important ones, including the Biological, Genetic, Evolutionary and different versions of the Phylogenetic Species Concept, are discussed in more detail. Specific questions addressed include the problem of asexual and prokaryotic species, intraspecific categories like subspecies and Evolutionarily Significant Units, and a potential solution to the species problem based on a hierarchical approach that distinguishes between ontological and operational species concepts. A full chapter is dedicated to the challenge of delimiting species by means of a discrete taxonomy in a continuous world of inherently fuzzy boundaries. Further, the book outlines the practical ramifications for ecology and evolutionary biology of how we define the species category, highlighting the danger of an apples and oranges problem if what we subsume under the same name ("species") is in actuality a variety of different entities. A succinct summary chapter, glossary and annotated list of references round out the coverage, making the book essential reading for all biologists looking for an accessible introduction to the historical, philosophical and practical dimensions of the species problem. (shrink)

Lists of species underpin many fields of human endeavour, but there are currently no universally accepted principles for deciding which biological species should be accepted when there are alternative taxonomic treatments (and, by extension, which scientific names should be applied to those species). As improvements in information technology make it easier to communicate, access, and aggregate biodiversity information, there is a need for a framework that helps taxonomists and the users of taxonomy decide which taxa and names should be used (...) by society whilst continuing to encourage taxonomic research that leads to new species discoveries, new knowledge of species relationships, and the refinement of existing species concepts. Here, we present 10 principles that can underpin such a governance framework, namely (i) the species list must be based on science and free from nontaxonomic considerations and interference, (ii) governance of the species list must aim for community support and use, (iii) all decisions about list composition must be transparent, (iv) the governance of validated lists of species is separate from the governance of the names of taxa, (v) governance of lists of accepted species must not constrain academic freedom, (vi) the set of criteria considered sufficient to recognise species boundaries may appropriately vary between different taxonomic groups but should be consistent when possible, (vii) a global list must balance conflicting needs for currency and stability by having archived versions, (viii) contributors need appropriate recognition, (ix) list content should be traceable, and (x) a global listing process needs both to encompass global diversity and to accommodate local knowledge of that diversity. We conclude by outlining issues that must be resolved if such a system of taxonomic list governance and a unified list of accepted scientific names generated are to be universally adopted. (shrink)

Species, or ‘the Species Problem’, is a topic in science, in the philosophy of science, and in general philosophy. There is not one, but many, species problems, and these are dealt with in this volume. Species are often thought of as units of biology, to be used in ecology, conservation, classification, and theory. The chapters in this book present opposing views on the current philosophical and conceptual issues of the Species Problem in biology. -/- Divided into four sections Theories and (...) Concepts, Practice and Methods, Ranks, Trees and Names, and Metaphysics and Epistemologies, the book is authored by systematists, philosophers, historians and working biologists, many leaders in their fields. Topics include Essentialism and individuals, speciation modes, theory and the species rank, nomenclature and diagnosis, scale of species, and ecology, conservation, and species. -/- Species Problems and Beyond aims to clarify the contemporary issues of the Species Problem. It is ideal for use in upper-level seminars and courses in Evolutionary Biology, Philosophy of Science, Philosophy of Biology, Systematics and Taxonomy, and Phylogenetics/Cladistics, and for any scholar in these fields. (shrink)

In the philosophy of the 17th and early 18th century, political legitimacy was regarded not least as a question of establishing a generally accepted and valid rationale for the imposition of norms. This question was given a new urgency in the context of the debate on natural law. The volume offers a detailed analysis of the major landmarks and positions in the development toward a secularized substantiation of legal norms. In so doing it focuses not only on the theoretical resources (...) and problems involved in such a substantiation but also inquires into the consequences and functions such normative processes have for political theory. (shrink)

Reading the Visual is an essential introduction that focuses on what teachers should know about multimodal literacy and how to teach it. This engaging book provides theoretical, curricular, and pedagogical frameworks for teaching a wide-range of visual and multimodal texts, including historical fiction, picture books, advertisements, websites, comics, graphic novels, news reports, and film. Each unit of study presented contains suggestions for selecting cornerstone texts and visual images and launching the unit, as well as lesson plans, text sets, and analysis (...) guides. These units are designed to be readily adapted to fit the needs of a variety of settings and grade levels. (shrink)

This article describes the important structural characteristics of a recently developed game-theoretic model of deterrence, summarizes the major deductions drown from it, and discusses its implications for both the theory of deterrence and the current strategic relationship of the superpowers. The model shows that a credible threat and a power advantage are neither necessary nor sufficient conditions for stable deterrence. It also suggests that, even under ideal conditions, deterrence is an intricate and fundamentally fragile relationship that rests, ultimately, upon the (...) preferences and perceptions of key decision-makers rather than upon the nature and composition of each side’s strategic arsenal. (shrink)

Giving advice to Henry Bolingbroke was a pastime that could be very rewarding or very dangerous. Consider the following two cases. In May 1401, a little over nineteen months after Henry had deposed his cousin Richard and ascended the throne, his friend and confessor Philip Repyngdon, at that time the abbot of St. Mary de Prè in Leicester and chancellor of Oxford, sent Henry a long letter about the condition of the realm. Henry had personally requested such a report, according (...) to the version of the letter preserved in Adam of Usk's Chronicle: “Whereas your singular serenity did require of me, the least of your servants, when last I went out from before you with heavy heart, that, if I should hear aught adverse, I should make it known unto your excellency without delay, now, as your most obedient servant, do I take my pen in hand to show what I have heard and seen.” And Repyngdon had apparently heard and seen a lot, as he claimed that “law and justice are banished from the realm; thefts, murders, adulteries, fornications, extortions, oppressions of the poor, hurts, wrongs, and much reproach, are rife; and one tyrant will doth serve for law.”. (shrink)

Name der Zeitschrift: Der Islam Jahrgang: 93 Heft: 2 Seiten: 585-588.