This paper presents a stylized bioeconomic model of hunter-gatherer foraging effort designed to study the process of intensification on open-access resources. A critical insight derived from the model is that the very success of an adaptation at the level of an individual forager group can create system-level vulnerabilities that subsequently feed back to cause emergent social change. The model illustrates how the intensification of harvest time by individuals within a habitat creates a forager-resource system that becomes vulnerable to perturbations. When (...) the system is vulnerable, it is characterized by two resource harvest equilibria: a sustainable, low-effort equilibrium and a degraded, high-effort equilibrium. In this situation, the forager-resource system can be shocked back and forth between these different equilibria by perturbations, generating considerable risk for foragers. We use the model to isolate the ecological conditions under which the instability of the system generates the risk that foragers will experience a shortfall of resources, and we suggest a mechanism that might lead foragers to adopt social institutions that regulate who can access a habitat as an adaptive response. As an illustration of the potential utility of the insights drawn from the model, comparisons are made with a substantial ethnographic data set. (shrink)

John Rawls says: “The main problem of distributive justice is the choice of a social system.” Property-owning democracy is the social system that Rawls thought best realized the requirements of his principles of justice. This article discusses Rawls’s conception of property-owning democracy and how it is related to his difference principle. I explain why Rawls thought that welfare-state capitalism could not fulfill his principles: it is mainly because of the connection he perceived between capitalism and utilitarianism.

An approach to argument macrostructure -- The dialectical nature of argument -- Toulmin's problematic notion of warrant -- The linked-convergent distinction, a first approximation -- Argument structure and disciplinary perspective : the linked-convergent versus multiple-co-ordinatively compound distinctions -- The linked-convergent distinction, refining the criterion -- Argument structure and enthymemes -- From analysis to evaluation.

Liberalism generally holds that legitimate political power is limited and is to be impartially exercised, only for the public good. Liberals accordingly assign political priority to maintaining certain basic liberties and equality of opportunities; they advocate an essential role for markets in economic activity, and they recognize government's crucial role in correcting market breakdowns and providing public goods. Classical liberalism and what I call “the high liberal tradition” are two main branches of liberalism. Classical liberalism evolved from the works of (...) Adam Smith and the classical utilitarian economists; its major 20th century representatives include Friedrich Hayek and Milton Friedman. The high liberal tradition developed from John Stuart Mill's works, and its major philosophical representatives in the 20th century are John Dewey and, later, John Rawls. This paper discusses the main distinguishing features of the classical and the high liberal traditions and their respective positions regarding capitalism as an economic and social system. Classical liberals, unlike high liberals, regard economic liberties and rights of private property in productive resources to be nearly as important as basic liberties. They conceive of equality of opportunity in more formal terms, and regard capitalist markets and the price system as essential not only to the allocation of production resources, but also as the fundamental criterion for the just distribution of income, wealth, and economic powers. High liberals, by contrast, regard the economic liberties as subordinate to the exercise of personal and civic liberties. They are prepared to regulate and restrict economic liberties to achieve greater equality of opportunities, reduce inequalities of economic powers, and promote a broader conception of the public good. And while high liberals endorse markets and the price system as essential to allocation of productive resources, they do not regard markets as the fundamental criterion for assessing just distributions of income, wealth, and economic powers and positions of responsibility. The paper concludes with some reflections upon the essential role that dissimilar conceptions of persons and society play in grounding the different positions on economic justice that classical and high liberals advocate. (shrink)

Mark Freeman's inspiring account of the burgeoning field of the psychological humanities presents a clear and compelling vision of what the discipline of psychology might become. Engaging and accessible, this bold, provocative book is destined to spark significant discussion and debate in audiences including advanced undergraduates, postgraduates, and professionals in the field of psychology with interests in theoretical and philosophical psychology.

This chapter contains section titled: Introduction A Global Distribution Principle? Problems with Globalizing the Difference Principle Conclusion Notes.

A platitude that took hold with Kuhn is that there can be several equally good ways of balancing theoretical virtues for theory choice. Okasha recently modelled theory choice using technical apparatus from the domain of social choice: famously, Arrow showed that no method of social choice can jointly satisfy four desiderata, and each of the desiderata in social choice has an analogue in theory choice. Okasha suggested that one can avoid the Arrow analogue for theory choice by employing a strategy (...) used by Sen in social choice, namely, to enhance the information made available to the choice algorithms. I argue here that, despite Okasha’s claims to the contrary, the information-enhancing strategy is not compelling in the domain of theory choice. (shrink)

John Rawls's focus on principles of justice for the basic structure of primary social institutions evolved from his early discussion of practices, social rules and Humean conventions, and his apparent commitment to a version of rule‐utilitarianism. Rawls says that there are two sources for the primacy assigned to the basic structure: the profound effects of basic social institutions on persons and their future prospects, and the need to maintain background justice. The chapter discusses three different kinds of reasons for the (...) primacy of principles for the basic structure: social nature of human relationships, ideals of persons and society, distributive justice and the importance of background justice. It concludes with a discussion of some prominent objections: monism vs dualism; capitalism, incentives and the institutional division of labor; the principles of justice are neither consequentialist nor prioritarian; social justice vs cosmopolitan justice. (shrink)

Objective interpretations of probability are usually discussed in two varieties: frequency and propensity accounts. But there is a third, neglected possibility, namely, probabilities as deriving from ranges in suitably structured initial state spaces. Roughly, the probability of an event is the proportion of initial states that lead to this event in the space of all possible initial states, provided that this proportion is approximately the same in any not too small interval of the initial state space. This idea can also (...) be expressed by saying that in the types of situations that give rise to probabilistic phenomena we may expect to find an initial state space such that any "reasonable" density function over this space leads to the same probabilities for the possible outcomes. This "method of arbitrary functions" was introduced by Poincaré, studied and extended by Hopf and more recently by Eduardo Engel, Jan von Plato and Michael Strevens. The natural-range, or method-of-arbitrary-functions approach to probabilities is usually treated as an explanation for the occurrence of probabilistic patterns, whereas I examine its prospects for an objective interpretation of probability, in the sense of providing truth conditions for probability statements that do not depend on our state of mind or information. The main objection to such a proposal is that it is circular, i.e. presupposes the concept of probability, because a measure on the initial state has to be introduced, and density functions over the space are considered. I try to argue that this objection can be successfully met. (shrink)

This paper develops and explores a new framework for theorizing about the measurement and aggregation of well-being. It is a qualitative variation on the framework of social welfare functionals developed by Amartya Sen. In Sen’s framework, a social or overall betterness ordering is assigned to each profile of real-valued utility functions. In the qualitative framework developed here, numerical utilities are replaced by the properties they are supposed to represent. This makes it possible to characterize the measurability and interpersonal comparability of (...) well-being directly, without the use of invariance conditions, and to distinguish between real changes in well-being and merely representational changes in the unit of measurement. The qualitative framework is shown to have important implications for a range of issues in axiology and social choice theory, including the characterization of welfarism, axiomatic derivations of utilitarianism, the meaningfulness of prioritarianism, the informational requirements of variable-population ethics, the impossibility theorems of Arrow and others, and the metaphysics of value. (shrink)

Perceptual experiences justify beliefs. A perceptual experience of a dog justifies the belief that there is a dog present. But there is much evidence that perceptual states can occur without being conscious, as in experiments involving masked priming. Do unconscious perceptual states provide justification as well? The answer depends on one’s theory of justification. While most varieties of externalism seem compatible with unconscious perceptual justification, several theories have recently afforded to consciousness a special role in perceptual justification. We argue that (...) such views face a dilemma: either consciousness should be understood in functionalist terms, in which case our best current theories of consciousness do not seem to imbue consciousness with any special epistemic features, or it should not, in which case it is mysterious why only conscious states are justificatory. We conclude that unconscious perceptual justification is quite plausible. (shrink)

David Rosenthal explains conscious mentality in terms of two independent, though complementary, theories—the higher-order thought (“HOT”) theory of consciousness and quality-space theory (“QST”) about mental qualities. It is natural to understand this combination of views as constituting a kind of representationalism about experience—that is, a version of the view that an experience’s conscious character is identical with certain of its representational properties. At times, however, Rosenthal seems to resist this characterization of his view. We explore here whether and to what (...) extent it makes sense to construe Rosenthal’s views as representationalist. Our goal is not merely terminological—discerning how best to use the expression ‘representationalism’. Rather, we argue that understanding Rosenthal’s account as a kind of representationalism permits us not only to make sense of broader debates within the philosophy of mind, but also to extend and clarify aspects of the view itself. (shrink)

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain (...) in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

This paper compares two alternative explanations of pragmatic encroachment on knowledge (i.e., the claim that whether an agent knows that p can depend on pragmatic factors). After reviewing the evidence for such pragmatic encroachment, we ask how it is best explained, assuming it obtains. Several authors have recently argued that the best explanation is provided by a particular account of belief, which we call pragmatic credal reductivism. On this view, what it is for an agent to believe a proposition is (...) for her credence in this proposition to be above a certain threshold, a threshold that varies depending on pragmatic factors. We show that while this account of belief can provide an elegant explanation of pragmatic encroachment on knowledge, it is not alone in doing so, for an alternative account of belief, which we call the reasoning disposition account, can do so as well. And the latter account, we argue, is far more plausible than pragmatic credal reductivism, since it accords far better with a number of claims about belief that are very hard to deny. (shrink)

Concepts. Health ; Disease ; Death -- Models and kinds. Causation and kinds ; Holism and reductionism ; Controversial diseases -- Evidence and inference. Evidence in medicine ; Objectivity and the social structure of science ; Inference ; Effectiveness, skepticism, and alternatives ; Diagnosis and screening -- Values and policy. Psychiatry: care or control? ; Policy ; Public health.

According to what Birch (2022) calls the theory-heavy approach to investigating nonhuman-animal consciousness, we select one of the well-developed theories of consciousness currently debated within contemporary cognitive science and investigate whether animals exhibit the neural structures or cognitive abilities posited by that theory as sufficient for consciousness. Birch argues, however, that this approach is in general problematic because it faces what he dubs the dilemma of demandingness—roughly, that we cannot use theories that are based on the human case to assess (...) consciousness in nonhuman animals and vice versa. We argue here that, though this dilemma may problematize the application of many current accounts of consciousness to nonhuman animals, it does not challenge the use of standard versions of the higher-order thought theory (“HOTT”) of consciousness, according to which a creature is in a conscious mental state just in case it is aware of being in that state via a suitable higher-order thought (“HOT”). We show this in two ways. First, we argue that, unlike many extant theories of consciousness, HOTT is typically motivated by a commonsense, and more importantly, neutral condition on consciousness that applies to humans and animals alike. Second, we offer new empirical and theoretical reasons to think that many nonhuman animals possess the relevant HOTs necessary for consciousness. Considering these issues not only reveals the explanatory power of HOTT and some of its advantages over rival accounts, but also enables us to further extend and clarify the theory. (shrink)

Das Verhältniss des Thomas von Aquino zum Judenthum und zur jüdischen Litteratur.--Eine bisher unbekannte dem Bachja ibn Pakuda zugeeignete Schrift.--Die philosophischen und ethischen Anschauungen in Abraham bar Chijja's Hegjon ha-Nefesch.--Ueber Abraham bar Chijja's "Buch der Enthüllung".--Die Familie Schemtob in ihren Beziehungen zur Philosophie.--Die Stellung des Simon ben Zemach Duran in der Geschichte der jüdischen Religionsphilosophie.--Die philosophischen Lehren des Isaak ben Salomon Israeli.

Medicalisation is a social phenomenon in which conditions that were once under legal, religious, personal or other jurisdictions are brought into the domain of medical authority. Low sexual desire in females has been medicalised, pathologised as a disease, and intervened upon with a range of pharmaceuticals. There are two polarised positions on the medicalisation of low female sexual desire: I call these the mainstream view and the critical view. I assess the central arguments for both positions. Dividing the two positions (...) are opposing models of the aetiology of low female sexual desire. I conclude by suggesting that the balance of arguments supports a modest defence of the critical view regarding the medicalisation of low female sexual desire. (shrink)

John Searle began to discuss his recently published book `The Construction of Social Reality' with Anthony Freeman, and they ended up talking about God. The book itself and part of their conversation are introduced and briefly reflected upon by Anthony Freeman. Many familiar social facts -- like money and marriage and monarchy -- are only facts by human agreement. They exist only because we believe them to exist. That is the thesis, at once startling yet obvious, that philosopher (...) John Searle explores in The Construction of Social Reality. (shrink)

Matteo Ricci (1552-1610) was an Italian Jesuit and one of the first Christian missionaries to China in the modern era. He was a genuine polymath—a translator, cartographer, mathematician, astronomer, and musician. Above all, Ricci was a missionary for the gospel. As we briefly examine his 1603 seminal work, The True Meaning of the Lord of Heaven, our hope is that we, as evangelical educators, will perceive some of the deeper principles necessary for our own missionary work among unreached people.

D. M. Armstrong famously claims that deterministic laws of nature are contingent relations between universals and that his account can also be straightforwardly extended to irreducibly probabilistic laws of nature. For the most part, philosophers have neglected to scrutinize Armstrong’s account of probabilistic laws. This is surprising precisely because his own claims about probabilistic laws make it unclear just what he takes them to be. We offer three interpretations of what Armstrong-style probabilistic laws are, and argue that all three interpretations (...) are incompatible either with some feature of Armstrong’s broader metaphysics or with essential features of his account of laws (or both). (shrink)

Medical scientists employ ‘quality assessment tools’ (QATs) to measure the quality of evidence from clinical studies, especially randomized controlled trials (RCTs). These tools are designed to take into account various methodological details of clinical studies, including randomization, blinding, and other features of studies deemed relevant to minimizing bias and error. There are now dozens available. The various QATs on offer differ widely from each other, and second-order empirical studies show that QATs have low inter-rater reliability and low inter-tool reliability. This (...) is an instance of a more general problem I call the underdetermination of evidential significance. Disagreements about the strength of a particular piece of evidence can be due to different—but in principle equally good—weightings of the fine-grained methodological features which constitute QATs. (shrink)

"A gem of enlightenment.... One rejoices in Bronowski's dedication to the identity of acts of creativity and of imagination, whether in Blake or Yeats or Einstein or Heisenberg."--Kirkus Reviews "According to Bronowski, our account of the world is dictated by our biology: how we perceive, imagine, symbolize, etc. He proposes to explain how we receive and translate our experience of the world so that we achieve knowledge. He examines the mechanisms of our perception; the origin and nature of natural language; (...) formal systems and scientific discourse; and how science, as a systematic attempt to establish closed systems one after another, progresses by exploring its own errors and new but unforeseen connections.... A delightful look at the inquiring mind."--Library Journal "Eminently enjoyable to read, with a good story or 'bon mot' on every page."--Nature "A well-written and brilliantly presented defense of the scientific enterprise which could be especially valuable to scientists and to teachers of science at all levels."--AAAS Science Books & Films Contents 1. The Mind as an Instrument for Understanding 2. The Evolution and Power of Symbolic Language 3. Knowledge as Algorithm and as Metaphor 4. The Laws of Nature and the Nature of Laws 5. Error, Progress, and the Concept of Time 6. Law and Individual Responsibility. (shrink)

Can we describe certain sonic experiences as “homely,” even when they take place outside of a traditional home-space? While phenomenological accounts of home abound, with writers detailing a rich spectrum of the felt characteristics of the homely including safety, familiarity, and affective “warmth,” there is a scarcity of research into sonic experience that engages with such literatures. With specific interest in the experience of embodied space, I account here for what might be termed feelings of “sonic homeliness” as they emerge (...) during headphone listening. After forming a conceptual model of homeliness that draws from phenomenological philosophy, I investigate its applicability to experiences of headphone listening. Through analysis of primary interview data, I consider how headphones may be said to territorialize space for listeners, analyzing how sonic “boundaries” are experienced in relation to the body, as well as how some listeners describe their experiences as interiorized, comforting, and “wombic.”. (shrink)

Handbook entry on "Synthesis," surveying the roles played by synthesis in Husserl, important precursors in the history of philosophy, and the legacy of the term in Heidegger and Merleau-Ponty.

Business ethics, corporate social responsibility, corporate citizenship, values-driven management, corporate governance, and ethical leadership are necessary ...

This book provides a detailed account of the role of property in German Idealism. It puts the concept of property in the center of the philosophical systems of Kant, Fichte, and Hegel and shows how property remains tied to their conceptions of freedom, right, and recognition. The book begins with a critical genealogy of the concept of property in modern legal philosophy, followed by a reconstruction of the theory of property in Kant's Doctrine of Right, Fichte's Foundations of Natural Right, (...) and Hegel's Jena Realphilosophie. By turning to the tradition of German Rechtsphilosophie, as opposed to the more standard libertarian and utilitarian frameworks of property, it explores the metaphysical, normative, political, and material questions that make property intelligible as a social relation. The book formulates a normative theory of property rooted in practical reason, mutual recognition, and social freedom. This relational theory of property, inspired by German Idealism, brings a fresh angle to contemporary property theory. Additionally, it provides crucial philosophical background to 19th century debates on private property, inequality, labor, socialism, capitalism, and the state. The Concept of Property in Kant, Fichte, and Hegel will appeal to scholars and advanced students interested in 19th Century German philosophy, social and political philosophy, philosophy of law, political theory, and political economy. (shrink)

In 1655 La Peyrère was the first to substantially argue for and popularize polygenism—the view that God created multiple original human mating pairs in separate acts of creation with numerous created before Adam. Positing or rejecting polygenism has been central to modern theorizing about human types and origins. Prominent recent interpreters have maintained that La Peyrère’s polygenism does not imply a hierarchy of human types. This paper reconstructs La Peyrère’s account and, in opposition to the dominant view, argues that his (...) polygenism produces a human species hierarchy. The Adamite species is superior to the Pre-Adamite species in virtue of its material composition, mode of creation, and form. The upshot is that La Peyrère’s theological system posits a proto-racialist conception of human types. (shrink)

Healthcare expenditures account for approximately 9% of GDP in OECD countries and are on an upward trajectory (OECD, 2017). This significant financial burden, combined with an aging global population and increasing demand, emphasizes the imperative for sustained research and innovation to enhance health system efficacy. Key to this transformation are technological advancements, including digital health, which presents novel opportunities for improvement. Emerging digital health technologies, such as virtual consultations, complex imaging procedures, and electronic medical records, are fundamental to modern healthcare (...) infrastructures. However, significant gaps remain in the evaluation and understanding of these innovations, especially for nascent technological areas. This thesis addresses this subject, aiming to delineate how individuals and institutions can bolster their evaluative capabilities, strategic decision-making, and planning for the deployment of emerging digital healthcare technologies. The research methodology amalgamates theoretical exploration, literature scrutiny, and empirical examinations, presenting an integrated perspective that intersects the disciplines of Management & Decision Science, Technology & Innovation, and Health Economics & Outcomes Research. From an applied perspective, this research focuses on developing evidence within the context of pediatric healthcare in Canada — a context notably underrepresented in healthcare management research, despite its disproportionate per capita expenditure. Technologically, the predominant focus is on applications in virtual reality (VR) and three-dimensional (3D) printing and virtualization, though with the aspiration of ensuring the generalizability of results. The current thesis is structured to parallel the progression of the research itself, as three distinct phases; this begins with a comprehensive Background that contextualizes the initial intent, exploring the relationship between technology, innovation, and health outcomes. In this phase, each academic discipline is analyzed to identify base theoretical underpinnings for the research. The second phase of this work includes five empirical studies, each preceded by context-specific literature reviews for the respective technological domain, providing insight into the current state of evidence related to value-based assessment and economic evaluation in that area. Empirical studies included a randomized controlled trial and a cost consequences assessment of VR for pre-procedural preparation for medical imaging. Additionally, novel applications of 3D printing and virtualization are critically analyzed, accompanied by a multi-case study on the implementation of 3D printing in pediatrics, a cost-consequences study of applications for thoracoabdominal surgeries, and an outcomes study on the use of 3D virtualization in medical education during the COVID-19 pandemic. The final phase of this research includes the critical analysis and synthesis of findings into a proposal for a novel value-based assessment and decision-making framework specific to emerging health innovations; this framework integrates insights and resources for clinicians, administrators, and policymakers. The outcomes of this research are skewed toward Knowledge Users, but also aims to advance the theoretical basis for health technology assessment (HTA). (shrink)

It has become part of the accepted wisdom to say that the twentieth century was the century of physics and the twenty-first century will be the century of biology. Two facts about the coming century are agreed on by almost everyone. Biology is now bigger than physics, as measured by the size of budgets, by the size of the workforce, or by the output of major discoveries; and biology is likely to remain the biggest part of science through the twenty-first (...) century. Biology is also more important than physics, as measured by its economic consequences, by its ethical implications, or by its effects on human welfare. (shrink)

Ed Freeman’s influential ideas on stakeholder theory, business ethics, humanities, and capitalism became foundational in the management field and turned around the mainstream thinking about business. Stakeholder theory developed by Freeman and others posits that business is not as much about profits, but rather about creating value for its stakeholders, including employees, customers, communities, financiers, and suppliers. The relationship between a company and its stakeholders is the essence of business and should be of utmost attention to its managers. (...) Managers should avoid resorting to trade-offs by prioritizing one stakeholder group (e.g., shareholders) over the others and strive to run their companies in the interests of all stakeholders. The idea of pursuing the interests of all stakeholders became revolutionary in management and went far beyond the management field, expanding to Law, Health Care, Education, Public Policy and Administration, and Environmental Policy. This book is a collection of Ed Freeman’s most influential and important works on stakeholder theory as well as business ethics, humanities, and capitalism. (shrink)

Wonder Woman and her fellow Amazons serve the full Greek pantheon, worshipping Aphrodite and Athena in particular. But Wonder Woman's realm is also home to Roman gods, African and Egyptian gods, and the new gods including Darkseid, Highfather, Orion, and Metron. Wonder Woman speaks to loyalty, integrity, and honor. She speaks to the best in people, as they relate to each other and care for one another. These values can be enough to keep people going, this orientation is what they (...) seek, and this is what they can know, what they understand to be true. Perhaps if they are seeking a god in order to find their place, they might look to Wonder Woman and her Amazonian virtues. They could do worse than submit to the loving authority of Princess Diana, god of war. (shrink)

In 1997 and 1998, the American secular philosopher Richard Rorty published a set of predictions about the twenty-first century ranging from the years 2014-95. He predicted, for instance, the election of a "strong man" in the 2016 presidential race and the proliferation of gun violence starting in 2014. He labels the years from 2014-44 the darkest years of American history, politics, and society. From 2045-95, Rorty thinks his own vision for "social hope" will be implemented within American society--a vision that (...) includes charity (in the Pauline sense), solidarity, and sympathy. Rorty considers himself a leftist, liberal, and a philosopher of hope. So why would a philosopher of hope predict such darkness and despair? In The Dark Years? Philosophy, Politics, and the Problem of Predictions philosopher and political theorist Jacob L. Goodson explains the fullness of Rorty's predictions, the problem of making predictions within the social sciences, and the reasons why even Rorty's vision for life after the "dark years" fails us on the standards of hope. Goodson argues that we ought to challenge the monopoly that American politics has as our object of hope. Goodson makes the case for a melancholic yet redemptive hope. -- back cover. (shrink)

Medical nihilism is the view that we should have little confidence in the effectiveness of medical interventions. Jacob Stegenga argues persuasively that this is how we should see modern medicine, and suggests that medical research must be modified, clinical practice should be less aggressive, and regulatory standards should be enhanced.

The history of the Frankfurt School cannot be fully told without examining the relationships of Critical Theorists to their Jewish family backgrounds. Jewish matters had significant effects on key figures in the Frankfurt School, including Max Horkheimer, Theodor W. Adorno, Erich Fromm, Leo Lowenthal and Herbert Marcuse. At some points, their Jewish family backgrounds clarify their life paths; at others, these backgrounds help to explain why the leaders of the School stressed the significance of antisemitism. In the post-Second World War (...) era, the differing relationships of Critical Theorists to their Jewish origins illuminate their distinctive stances toward Israel. This book investigates how the Jewish backgrounds of major Critical Theorists, and the ways in which they related to their origins, impacted upon their work, the history of the Frankfurt School, and differences that emerged among them over time. (shrink)