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.

Levels of organization and their use in science have received increased philosophical attention of late, including challenges to the well-foundedness or widespread usefulness of levels concepts. One kind of response to these challenges has been to advocate a more precise and specific levels concept that is coherent and useful. Another kind of response has been to argue that the levels concept should be taken as a heuristic, to embrace its ambiguity and the possibility of exceptions as (...) acceptable consequences of its usefulness. In this chapter, I suggest that each of these strategies faces its own attendant downsides, and that pursuit of both strategies (by different thinkers) compounds the difficulties. That both kinds of approaches are advocated is, I think, illustrative of the problems plaguing the concept of levels of organization. I end by suggesting that the invocation of levels may mislead scientific and philosophical investigations more than it informs them, so our use of the levels concept should be updated accordingly. (shrink)

Two major clarifications have greatly abetted the understanding and fruitful expansion of the theory of natural selection in recent years: the acknowledgment that interactors, not replicators, constitute the causal unit of selection; and the recognition that interactors are Darwinian individuals, and that such individuals exist with potency at several levels of organization (genes, organisms, demes, and species in particular), thus engendering a rich hierarchical theory of selection in contrast with Darwin’s own emphasis on the organismic level. But a piece (...) of the argument has been missing, and individuals at levels distinct from organisms have been denied potency (although granted existence within the undeniable logic of the theory), because they do not achieve individuality with the same devices used by organisms and therefore seem weak by comparison. We show here that different features define Darwinian individuality across scales of size and time. In particular, species-individuals may develop few emergent features as direct adaptations. The interactor approach works with emergent fitnesses, not with emergent features; and species, as a consequence of their different mechanism for achieving individuality (reproductive exclusivity among subparts, that is, among organisms), express many effects from other levels. Organisms, by contrast, suppress upwardly cascading effects, because the organismic style of individuality (by functional integration of subparts) does not permit much competition or differential reproduction of parts from within. Species do not suppress the operation of lower levels; such effects therefore become available as exaptations conferring emergent fitness—a primary source of the different strength that species achieve as effective Darwinian individuals in evolution. (shrink)

Marr's levels of analysis—computational, algorithmic, and implementation—have served cognitive science well over the last 30 years. But the recent increase in the popularity of the computational level raises a new challenge: How do we begin to relate models at different levels of analysis? We propose that it is possible to define levels of analysis that lie between the computational and the algorithmic, providing a way to build a bridge between computational- and algorithmic-level models. The key idea is (...) to push the notion of rationality, often used in defining computational-level models, deeper toward the algorithmic level. We offer a simple recipe for reverse-engineering the mind's cognitive strategies by deriving optimal algorithms for a series of increasingly more realistic abstract computational architectures, which we call “resource-rational analysis.”. (shrink)

To begin, I introduce an analysis of interlevel relations that allows us to offer an initial characterization of the debate about the way classical and connectionist models relate. Subsequently, I examine a compatibility thesis and a conditional claim on this issue.With respect to the compatibility thesis, I argue that, even if classical and connectionist models are not necessarily incompatible, the emergence of the latter seems to undermine the best arguments for the Language of Thought Hypothesis, which is essential to the (...) former. (shrink)

Niche construction theory inherits flaws from previous gene-culture coevolutionary theories. Units of cultural transmission have not yet been defined. Vertical transmission is not necessarily an overwhelmingly important part of culture. The assumption that human genetic interests and human cultural interests are in synch is a form of naive group selection.

The concept of levels of organization, despite its widespread scientific currency, has recently been criticized by a number of philosophers of science. This paper diagnoses the main source of problems facing theories of levels. On this basis, the problems with the usual criteria for distinguishing levels are evaluated: compositional relations, organizational types, and spatial scales. Drawing on some work on hierarchies in ecology, I argue in favor of an alternative conception of levels defined by the criterion (...) of rates or time scales of processes. (shrink)

Examination of recent debates about belief shows the need to distinguish: (a) non-linguistic informational states in animal perception; (b) the uncritical use of language, e.g. by children; (c) adult humans' reasoned judgments. If we also distinguish between mind-directed and object-directed mental states, we have: Perceptual 'beliefs' of animals and infants about their material environment. 'Beliefs' of animals and infants about the mental states of others. Linguistically-expressible beliefs about the world, resulting from e.g. the uncritical tendency to believe what we are (...) told. Uncritically-formed beliefs about the mental states. Beliefs about the material world arrived at by the weighing of evidence. Beliefs about mental states formed by critical assessment. (shrink)

While the research programs in early cognitive science and artificial intelligence aimed to articulate what cognition was in ideal terms, much research in contemporary computational neuroscience looks at how and why brains fail to function as they should ideally. This focus on impairment affects how we understand David Marr's hypothesized three levels of understanding. In this essay, we suggest some refinements to Marr's distinctions using a population activity model of cortico-striatal circuitry exploring impulsivity and behavioral inhibition as a case (...) study. In particular, we urge that Marr's computational level should be redefined to include a description of how systems break down. We also underscore that feed-forward processing, cognition disconnected from behavioral context, and representations do not always drive cognition in the way that Marr originally assumed. (shrink)

Research on the normative aspect of leadership is still a relatively new enterprise within the mainstream of leadership studies. In the past, most academic inquiry into leadership was grounded in a social scientific paradigm that largely ignored the ethical substance of leadership. However, perhaps because of a number of public and infamous cases of failure in business leadership, in recent years there has been renewed interest in the ethical side of leadership in business. This paper argues that ethical issues of (...) leadership actually arise at number of different levels, and that it is important to distinguish between various diverse kinds of ethical issues that arise in the study of leadership. The three levels identified are the level of the individual morality of leaders, the level of the means of their leadership, and the level of the leadership mission itself. We argue that only by fully understanding all of the different levels of ethical analysis pertinent to business leadership, and the distinctive kind of issues that arise at each level, can we fully integrate normative studies of leadership into the field of leadership studies. As such, this paper offers a model that incorporates three different levels of ethical analysis that can be used to study normative issues in leadership studies. Such a model can be used to better understand and integrate ethical issues into research, teaching, and training in leadership. (shrink)

The paper addresses a question concerning George Ellis’s theory of top-down causation by considering a challenge to the “level-picture of nature” which he employs as a foundational element in his theory. According to the level-picture, nature is ordered by distinct and finitely many levels, each characterised by its own types of entities, relations, laws and principles of behavior, and causal relations to their respective neighbouring top- and bottom-level. The branching hierarchy that results from this picture enables Ellis to build (...) his model of modular hierarchical structure for complexity, his account of same-level, bottom-up and top-down causation, of emergence, equivalence-classes and multiple realisability. The three main arguments for the level-picture in Ellis’s works are reconstructed and shown to face serious problems. Finally, the paper presents a possible solution to this challenge by introducing a reformulation of certain fundamental points of Ellis’s theory that does without the level-picture of nature. This allows us to preserve all of his central claims about the model of complexity, the three types of causation, emergence, equivalence-classes and multiple realisability. Any problems pertaining to the level-picture can be remedied in the context of Ellis’s theory of top-down causation. (shrink)

In this paper we discuss the extent to which the very existence of substructural logics puts the Tarskian conception of logical systems in jeopardy. In order to do this, we highlight the importance of the presence of different levels of entailment in a given logic, looking not only at inferences between collections of formulae but also at inferences between collections of inferences—and more. We discuss appropriate refinements or modifications of the usual Tarskian identity criterion for logical systems, and propose (...) an alternative of our own. After that, we consider a number of objections to our account and evaluate a substantially different approach to the same problem. (shrink)

In many animals, early development of the embryo is characterized by synchronous, biphasic cell divisions. These cell divisions are controlled by maternally inherited proteins and RNAs. A critical question in developmental biology is how the embryo transitions to a later pattern of asynchronous cell divisions and transfers the prior maternal control of development to the zygotic genome. The most‐common model regarding how this transition from maternal to zygotic control is regulated posits that this is a consequence of the limitation of (...) maternal gene products, due to their titration during early cell divisions. Here we discuss a recent article by Crest et al.1 that instead proposes that the balance of Cyclin‐dependent Kinase 1 and Cyclin B (Cdk1‐CycB) activity relative to that of the Drosophila checkpoint kinase Chk1 determines when asynchronous divisions begin. BioEssays 29:949–952, 2007. © 2007 Wiley Periodicals, Inc. (shrink)

Background In the globalizing world, nurses often meet humans from different cultures and values. This fact has led them to make ethical decisions, which do not comply with their own moral jurisdictions at care setting. Objectives The objective of the study was to investigate the relationships between moral development levels of the nurses and their scores of nursing principled thinking and practical consideration during decision making for ethical dilemmas. Methods This was a descriptive correlational study. Nursing Dilemma Test, Moral (...) Development Scale for Professionals and socio-demographic form were used. Study was conducted with 227 nurses. Ethical considerations: An institutional authorization, an ethics approval from non-interventional ethics committee of the respective university, permission from the authors of the scales used and informed consents from the nurses were obtained in order to conduct the study. Results In this study, nurses were found to be at post-conventional level according to Kohlberg’s moral development theory. Sociodemographic and working characteristics of the nurses have not affected their scores of moral development level and their scores of nursing principled thinking, practical consideration and familiarity (p > 0.05). Nurses take attention for moral principles during decision making although not at a desirable level, and they are relatively affected by environmental factors Conclusion Although nurses are familiar with ethical problems at scenarios including ethical dilemmas, they cannot make decisions in accordance with their moral development levels during decision making for ethical dilemmas. Nurses should be instructed and supported for ethical decision making by recognizing factors that may be effective on their decision making. (shrink)

The levels of selection debate is generally taken to be a debate about how natural selection can occur at the various levels of biological organization. In this paper, we argue that questions about levels of selection should be analyzed separately from questions about levels of organization. In the deflationary proposal we defend, all that is necessary for multilevel selection is that there are cases in which particles are nested in collectives, and that both the collectives and (...) the particles that compose them each separately undergo natural selection. We argue that adopting this deflationary account helps to disentangle the levels of selection and the levels of organization, and thereby contributes to advancing the levels of selection debate. (shrink)

(1984). Goodbye to the School System— Goodbye to the System of Leisure and Recreation? Aspects of the decay of the last dominant mode of socialisation at the levels of meaning and identity[1] Educational Studies: Vol. 10, No. 1, pp. 43-63.

Plotinus' Treatise V.1 comes closer than any other to providing an outline of his entire spiritual and metaphysical system, and as such it may serve to some degree as an introduction to his philosophy. It addresses in condensed form a great many topics to which Plotinus elsewhere devotes extended discussion, including the problem of the multiple self; eternity and time; the unity-in-duality of intellect and the intelligible; and the derivation of intelligible being from the One. Above all, it shows that (...) the so-called "three hypostases"--soul, intellect, and the One--are best understood not as a sequence of three things additional to one another, but as three levels of possession of the same content, so that each lower level--soul in relation to intellect and intellect in relation to the One--is an "image" and "expression" of its superior. Plotinus exhorts the human soul to overcome its alienation from its own true nature and its divine origin by first recognizing itself as superior to the body and the same in kind as the animating principle of the entire cosmos, and then discovering within itself the still higher levels of reality from which it derives: intellect and, ultimately, the One or Good, the supreme first principle of all things. To do so the soul must redirect its attention inward and upward to become aware of the divinity which is always within it but from which it is distracted by the clamor of the senses. (shrink)

Physical education is often selected for applying multilingual initiatives through the use of the content and language integrated learning (CLIL) approach. However, it is still unclear whether the introduction of such approach might entail losing Physical Education’s essence and distorting its basic purposes. The aim of this study is to analyse the impact of CLIL on the Physical Education lessons. Given the purpose of this study, a mixed methodological approach based on a sequential exploratory design divided in two different phases (...) is used. We begin with an initial qualitative data collection (phase I) consisting in the analysis of interviews with 12 participants (8 teachers and 4 students). Based on its analysis, two foci are identified: social relationships and physical activity. Then, informed by the results obtained, a quantitative approach is used (phase II), differentiating these two sets of data to deepen on them. On one part, a sociometric questionnaire was applied to analyse the social relationships among CLIL students. On the other part, a quasi-experimental design (n = 49) was implemented using accelerometry to measure the MVPA of the PE sessions. Regarding physical activity, the results show that levels of MVPA are higher in the experimental group (CLIL) than in the control group showing light to the divergent viewpoints of interviewees. However, focusing on social relationships, the sociometric questionnaire results show that there were no statistical significative changes, although some signs of a slight effect on students’ relationships arise depending on their gender. Therefore, more research would be necessary to deepen on how CLIL affects in this regard. (shrink)

With the spread of Information and Communication Technologies tools and the Internet, Twenty first century technologies have significantly affected human life, and it has been desired to be obtained continuously. It has become challenging to protect information due to the increase in the methods by which malicious people can get information. As a result, it is crucial to determine people’s awareness levels by revealing the risks and threats to information security. In this context, a study was conducted to show (...) the awareness levels of teachers who come after the family in raising conscious individuals in society. For this purpose, a quantitative research method was adopted for the problem and sub-problems that form the basis of the research. The survey model, one of the research designs used within the framework of the quantitative research method, was used. Information Security Awareness Scale was applied to 394 teachers, and according to the results obtained, it was determined that the information security awareness level of the teachers was moderate. According to the attacks and threats sub-dimension, which includes technical issues, it has been determined that the awareness levels of the teachers are at a medium level. The study results show that female teachers’ information security awareness levels are lower than male teachers. In comparison, the awareness levels of those who received information security awareness training and information technology teachers are higher. (shrink)

This paper provides an axiomatic analysis of sufficientarian social evaluation. Sufficientarianism has emerged as an increasingly important notion of distributive justice. We propose a class of principles that we label generalized critical-level sufficientarian orderings. The distinguishing feature of our new class is that its members exhibit constant critical levels of well-being that are allowed to differ from the threshold of sufficiency. Our basic axiom assigns priority to those below the threshold, a property that is shared by numerous other sufficientarian (...) approaches. When combined with the well-known strong Pareto principle and the assumption that there be a constant critical level, the axiom implies that the critical level cannot be below the threshold. The main results of the paper are characterizations of our new class and an important subclass. As a final observation, we identify the generalized critical-level sufficientarian orderings that permit us to avoid the repugnant conclusion and the sadistic conclusion, which are known as two fundamental challenges in population ethics. (shrink)

Background: Compassion-based practices in midwifery are the most important expression of the depth of care quality. This concept is insufficiently represented in literature, therefore, studies on this subject are of utmost importance. Objectives: This study aims to determine the levels of compassion of midwives working in the delivery room and the factors affecting these levels. The study was carried out in Kocaeli, Turkey. Methods: This descriptive study was carried out from 1 February to 15 April 2019 in delivery (...) rooms of six different hospitals located in the provincial centre of Kocaeli, Turkey, with 78 actively working midwives. Data were collected using a ‘Compassion Scale’ and analysed using the Mann–Whitney U test, the Kruskal–Wallis H test and the Spearman correlation test. Ethical considerations: This study was conducted according to ethical scientific guidelines. Results: The compassion score of the midwives were found to be 4.19 ± 0.39. The total compassion score was affected by professional factors such as number of patients, alternating shift work, number of traumatic births and work satisfaction. While the kindness subscores decreased depending on shift work and number of traumatic births, it was determined that the midwives who were satisfied with their work had higher kindness scores than those who were not. Also, as the age and professional experience of the midwives and the number of traumatic births increased, their indifference score also increased. Midwives who reported that they were not satisfied with their job had higher scores regarding separation and disengagement scores than those who were satisfied with their job. Conclusion: It was determined that the compassion levels of midwives were found to be negatively affected by factors such as age, professional experience, job satisfaction and number of monthly traumatic births in a month. They should be reminded that compassionate midwifery care for women is a basic human right. (shrink)

The origin and prevalence of transposable elements may best be understood as resulting from “selfish” evolutionary processes at the within-genome level, with relevant populations being all members of the same TE family or all potentially mobile DNAs in a species. But the maintenance of families of TEs as evolutionary drivers, if taken as a consequence of selection, might be better understood as a consequence of selection at the level of species or higher, with the relevant populations being species or ecosystems (...) varying in their possession of TEs. In 2015, Brunet and Doolittle made the case for legitimizing claims for an evolutionary role for TEs by recasting such claims as being about species selection. Here I further develop this “how possibly” argument. I note that with a forgivingly broad construal of evolution by natural selection we might come to appreciate many aspects of Life on earth as its products, and TEs as—possibly—contributors to the success of Life by selection at several levels of a biological hierarchy. Thinking broadly makes this proposition a testable Darwinian one. (shrink)

Caenorhabditis elegans is a tiny worm that has become the focus of a large number of worldwide research projects examining its genetics, development, neuroscience, and behavior. Recently several groups of investigators have begun to tie together the behavior of the organism and the underlying genes, neural circuits, and molecular processes implemented in those circuits. Behavior is quintessentially organismal—it is the organism as a whole that moves and mates—but the explanations are devised at the molecular and neurocircuit levels, and tested (...) in populations using protocols that span many levels of aggregation. Following a brief review of the main relevant features of C. elegans, I describe some of these circuits, and then discuss two contrasting approaches in behavioral genetics and neural network analysis of the worm. Finally, I outline the rudiments of a “field and focus” explanation model using the two contrasting approaches. (shrink)

We analyze the set-theoretic strength of determinacy for levels of the Borel hierarchy of the form$\Sigma _{1 + \alpha + 3}^0 $, forα<ω1. Well-known results of H. Friedman and D.A. Martin have shown this determinacy to requireα+ 1 iterations of the Power Set Axiom, but we ask what additional ambient set theory is strictly necessary. To this end, we isolate a family of weak reflection principles, Π1-RAPα, whose consistency strength corresponds exactly to the logical strength of${\rm{\Sigma }}_{1 + \alpha (...) + 3}^0 $determinacy, for$\alpha < \omega _1^{CK} $. This yields a characterization of the levels ofLby or at which winning strategies in these games must be constructed. Whenα= 0, we have the following concise result: The leastθso that all winning strategies in${\rm{\Sigma }}_4^0 $games belong toLθ+1is the least so that$L_\theta \models {\rm{``}}{\cal P}\left$exists, and all wellfounded trees are ranked”. (shrink)

Inwagen, Peter van_Dispensing with Ontological Levels.

In this work, the author has fashioned out of the logical and linguistic theses of his earlier books a full-scale but readily intelligible account of moral argument.

In the context of technological dissemination sessions aimed at prospective students at the Polytechnic University of Baja California in the city of Mexicali, Baja California, the importance of engineering and its role in scientific and technological progress was stressed, as well as its role in scientific and technological progress as drivers of economic development in the region. A group of 2,154 students from 20 different institutions of public high school education answered a survey designed as an evaluation tool for a (...) career path or technology area of interest. The survey results show that students have a low preference for engineering careers. Moreover, these results were augmented with an additional study on the high attrition of students in engineering schools in the city of Mexicali, Baja California, also conducted by the authors. It raises the importance of teaching science in the early education levels, which aims to prepare scientists and technologists needed for the development of research and innovation as a foundation for economic prosperity and welfare of an emerging economy such as Mexico. (shrink)

I applaud recent improvements upon previous guidelines for the assessment of pain in non-human species and the application of their framework towards decapod crustaceans. Rather than constituting a mere intermediate solution between the scientific difficulty of settling questions of animal consciousness and the need for a framework for the purposes of animal welfare legislation, I will argue that the longer lists of criteria for animal sentience should make us realize that animal sentience is a multi-dimensional phenomenon that must be studied (...) with a plethora of methods in order to assess its diversity across the tree of life. (shrink)