George Biddell Airy invented the first successful mechanical system of compass correction in 1838, at a time when iron ship-building, especially for steam-driven vessels, had become firmly established. One serious drawback to iron ships was the difficulty in the management of the magnetic compass on board due to the magnetic condition of the ship. The introduction to this paper, which outlines the early history of ship magnetism, is followed by a brief account of Airy's mechanical system. The main purpose of (...) the paper, however, is to comment on the detailed correspondence relating to the adjustment of the compass, by the Astronomer Royal himself, of the first iron sailing vessel, the Ironside, in November 1838; and to consider the degree of success, at least for the Ironside, of the new plan which was readily adopted for ships of the Mercantile Marine. (shrink)

With the advent of iron-built ships in the early nineteenth century the problem of managing a magnetic compass on board presented considerable difficulty. Prominent among the early scientists who tackled the problem were George Biddell Airy and William Scoresby. Airy had provided a mechanical system, employing correctors in the form of steel magnets and wrought iron masses, by which the ship's magnetic field at the compass position is neutralized. He based his system on the concept that the magnetism acquired by (...) an iron ship during her construction remained with the ship throughout her life. Scoresby, on the other hand, thought differently. After having conducted a thorough and systematic series of experiments on iron plates and bars, he concluded that the magnetic character of an iron ship is liable to sudden and unexpected change. Scoresby argued, therefore, that Airy's system was defective and, indeed, dangerous. The aim of this paper is to discuss the two views which brought Airy and Scoresby into a conflict which is documented in a series of letters to the editor of The Athenaeum. (shrink)

Philosophy of science is expanding via the introduction of new digital data and tools for their analysis. The data comprise digitized published books and journal articles, as well as heretofore unpublished material such as images, archival text, notebooks, meeting notes, and programs. The growth in available data is matched by the extensive development of automated analysis tools. The variety of data sources and tools can be overwhelming. In this article, we survey the state of digital work in the philosophy of (...) science, showing what kinds of questions can be answered and how one can go about answering them. (shrink)

The idea of ‘reversion’ or ‘atavism’ has a peculiar history. For many authors in the latenineteenth and early-twentieth centuries – including Darwin, Galton, Pearson, Weismann, and Spencer, among others – reversion was one of the central phenomena which a theory of heredity ought to explain. By only a few decades later, however, Fisher and others could look back upon reversion as a historical curiosity, a non-problem, or even an impediment to clear theorizing. I explore various reasons that reversion might have (...) appeared to be a central problem for this first group of figures, focusing on their commitment to a variety of conceptual features of evolutionary theory; discuss why reversion might have then ceased to be an interesting phenomenon; and, finally, close with some more general thoughts about the death of scientific problems. (shrink)

Through criticism and analysis of ancient traditions, Kahn reconstructs the pattern of Anaximander’s thought using historical methods akin to the reconstructive techniques of comparative linguists.

Charles Darwin (1809–1882) Charles Darwin is primarily known as the architect of the theory of evolution by natural selection. With the publication of On the Origin of Species in 1859, he advanced a view of the development of life on earth that profoundly shaped nearly all biological and much philosophical thought which followed. A number….

-/- For all that digital methods—including network visualization, text analysis, and others—have begun to show extensive promise in philosophical contexts, a tension remains between two uses of those tools that have often been taken to be incompatible, or at least to engage in a kind of trade-off: the discovery of new hypotheses and the testing of already-formulated positions. This paper presents this basic distinction, then explores ways to resolve this tension with the help of two interdisciplinary case studies, taken from (...) preregistration in contemporary science and the debate over whig history in the history of science. These case studies, the paper argues, refocus our attention from a mutually exclusive testing/discovery binary to the relationship between our background data or philosophical views and the empirical generalizations that we might draw from the data. Finally, it develops a set of three challenges for philosophers and corresponding avenues for future work that will, it is hoped, allow us to better justify our use of these methods. (shrink)

The Rise of Chance in Evolutionary Theory: A Pompous Parade of Arithmetic explores a pivotal conceptual moment in the history of evolutionary theory: the development of its extensive reliance on a wide array of concepts of chance. It tells the history of a methodological and conceptual development that reshaped our approach to natural selection over a century, ranging from Darwin’s earliest notebooks in the 1830s to the early years of the Modern Synthesis in the 1930s. Far from being a “pompous (...) parade of arithmetic,” as one early critic argued, evolution transformed during this period to make these conceptual and technical tools indispensable. This book charts the role of chance in evolutionary theory from its beginnings to the earliest days of modern evolutionary theory, making it an ideal resource for evolutionary biologists, historians, philosophers, and researchers in science studies or biological statistics. (shrink)

Behind the superficial obscurity of what fragments we have of Heraclitus' thought, Professor Kahn claims that it is possible to detect a systematic view of human existence, a theory of language which sees ambiguity as a device for the expression of multiple meaning, and a vision of human life and death within the larger order of nature. The fragments are presented here in a readable order; translation and commentary aim to make accessible the power and originality of a systematic thinker (...) and the first great master of artistic prose. The commentary locates Heraclitus within the tradition of early Greek thought, but stresses the importance of his ideas for contemporary theories of language, literature and philosophy. (shrink)

This book proposes a new paradigm for the interpretation of Plato's early and middle dialogues. Rejecting the usual assumption of a distinct 'Socratic' period in the development of Plato's thought, this view regards the earlier works as deliberate preparation for the exposition of Plato's mature philosophy. Differences between the dialogues do not represent different stages in Plato's own thinking but rather different aspects and moments in the presentation of a new and unfamiliar view of reality. Once the fictional character of (...) the Socratic genre is recognised, there is no reason to regard Plato's early dialogues as representing the philosophy of the historical Socrates. The result is a unified interpretation of all of the dialogues down to the Republic and the Phaedrus. (shrink)

This book proposes a new paradigm for the interpretation of Plato's early and middle dialogues. Rejecting the usual assumption of a distinct 'Socratic' period in the development of Plato's thought, this view regards the earlier works as deliberate preparation for the exposition of Plato's mature philosophy. Differences between the dialogues do not represent different stages in Plato's own thinking but rather different aspects and moments in the presentation of a new and unfamiliar view of reality. Once the fictional character of (...) the Socratic genre is recognised, there is no reason to regard Plato's early dialogues as representing the philosophy of the historical Socrates. The result is a unified interpretation of all of the dialogues down to the Republic and the Phaedrus. (shrink)

My aim here is to make sense of Plato's account of desire in the middle dialogues. To do that I need to unify or reconcile what are at first sight two quite different accounts: the doctrine of eros in the Symposium and the tripartite theory of motivation in the Republic. It may be that the two theories are after all irreconcilable, that Plato simply changed his mind on the nature of human desire after writing the Symposium and before composing the (...) Republic. But that conclusion can be justified only if attempts to reconcile the two theories end in failure. The attempt must be made first. (shrink)

Translation of and Foreword to Charles H. Kahn's "Language and Ontology".

There are a bewildering variety of claims connecting Darwin to nineteenth-century philosophy of science—including to Herschel, Whewell, Lyell, German Romanticism, Comte, and others. I argue here that Herschel’s influence on Darwin is undeniable. The form of this influence, however, is often misunderstood. Darwin was not merely taking the concept of “analogy” from Herschel, nor was he combining such an analogy with a consilience as argued for by Whewell. On the contrary, Darwin’s Origin is written in precisely the manner that one (...) would expect were Darwin attempting to model his work on the precepts found in Herschel’s Preliminary Discourse on Natural Science. While Hodge has worked out a careful interpretation of both Darwin and Herschel, drawing similar conclusions, his interpretation misreads Herschel’s use of the vera causa principle and the verification of hypotheses. The new reading that I present here resolves this trouble, combining Hodge’s careful treatment of the structure of the Origin with a more cautious understanding of Herschel’s philosophy of science. This interpretation lets us understand why Darwin laid out the Origin in the way that he did and also why Herschel so strongly disagreed, including in Herschel’s heretofore unanalyzed marginalia in his copy of Darwin’s book. (shrink)

The poem of Parmenides is the earliest philosophic text which is preserved with sufficient completeness and continuity to permit us to follow a sustained line of argument. It is surely one of the most interesting arguments in the history of philosophy, and we are lucky to have this early text, perhaps a whole century older than the first dialogues of Plato. But the price we must pay for our good fortune is to face up to a vipers' nest of problems, (...) concerning details of the text and the archaic language but also concerning major questions of philosophic interpretation. These problems are so fundamental that, unless we solve them correctly, we cannot even be clear as to what Parmenides is arguing for, or why. And they are so knotted that we can scarcely unravel a single problem without finding the whole nest on our hands. (shrink)

Recent arguments concerning the nature of causation in evolutionary theory, now often known as the debate between the 'causalist' and 'statisticalist' positions, have involved answers to a variety of independent questions – definitions of key evolutionary concepts like natural selection, fitness, and genetic drift; causation in multi-level systems; or the nature of evolutionary explanations, among others. This Element offers a way to disentangle one set of these questions surrounding the causal structure of natural selection. Doing so allows us to clearly (...) reconstruct the approach that some of these major competing interpretations of evolutionary theory have to this causal structure, highlighting particular features of philosophical interest within each. Further, those features concern problems not exclusive to the philosophy of biology. Connections between them and, in two case studies, contemporary metaphysics and philosophy of physics demonstrate the potential value of broader collaboration in the understanding of evolution. (shrink)

(Editorial introduction to a special issue of Synthese.).

A fascinating portrait of the Pythagorean tradition, including a substantial account of the Neo-Pythagorean revival, and ending with Johannes Kepler on the threshold of modernism.

Plato's late dialogues have often been neglected because they lack the literary charm of his earlier masterpieces. Charles Kahn proposes a unified view of these diverse and difficult works, from the Parmenides and Theaetetus to the Sophist and Timaeus, showing how they gradually develop the framework for Plato's late metaphysics and cosmology. The Parmenides, with its attack on the theory of Forms and its baffling series of antinomies, has generally been treated apart from the rest of Plato's late work. (...) Kahn shows that this perplexing dialogue is the curtain-raiser on Plato's last metaphysical enterprise: the step-by-step construction of a wider theory of Being that provides the background for the creation story of the Timaeus. This rich study, the natural successor to Kahn's earlier Plato and the Socratic Dialogue, will interest a wide range of readers in ancient philosophy and science. (shrink)

There are two motivations commonly ascribed to historical actors for taking up statistics: to reduce complicated data to a mean value (e.g., Quetelet), and to take account of diversity (e.g., Galton). Different motivations will, it is assumed, lead to different methodological decisions in the practice of the statistical sciences. Karl Pearson and W. F. R. Weldon are generally seen as following directly in Galton’s footsteps. I argue for two related theses in light of this standard interpretation, based on a reading (...) of several sources in which Weldon, independently of Pearson, reflects on his own motivations. First, while Pearson does approach statistics from this "Galtonian" perspective, he is, consistent with his positivist philosophy of science, utilizing statistics to simplify the highly variable data of biology. Weldon, on the other hand, is brought to statistics by a rich empiricism and a desire to preserve the diversity of biological data. Secondly, we have here a counterexample to the claim that divergence in motivation will lead to a corresponding separation in methodology. Pearson and Weldon, despite embracing biometry for different reasons, settled on precisely the same set of statistical tools for the investigation of evolution. (shrink)

Philosophers of biology have worked extensively on how we ought best to interpret the probabilities which arise throughout evolutionary theory. In spite of this substantial work, however, much of the debate has remained persistently intractable. I offer the example of Bayesian models of divergence time estimation as a case study in how we might bring further resources from the biological literature to bear on these debates. These models offer us an example in which a number of different sources of uncertainty (...) are combined to produce an estimate for a complex, unobservable quantity. These models have been carefully analyzed in recent biological work, which has determined the relationship between these sources of uncertainty, both quantitatively and qualitatively. I suggest here that this case shows us the limitations of univocal analyses of probability in evolution, as well as the simple dichotomy between “subjective” and “objective” probabilities, and I conclude by gesturing toward ways in which we might introduce more sophisticated interpretive taxonomies of probability as a path toward advancing debates on probability in the life sciences. (shrink)

Mysticism and the mystical experience seemingly play little or no part in our Western tradition. Certainly there is no mystical tradition in the West such as Zen Buddhism, nor is there any great understanding of or influence from the writings of Heraclitus, Spinoza, or the mystical passages in the early work of Wittgenstein. Mysticism has been generally misunderstood in the West, and it has even evoked the attacks of philosophers and theologians. 1 Mysticism to many conjures up images of monks (...) meditating in caves; it is generally pictured as esoteric, otherworldly, irrational, and at best irrelevant to the daily lives of human beings. If what we say below is correct, it will be seen that mysticism is none of these but is rather a singular human experience that lies at the foundations of civilization. (shrink)

The propensity interpretation of fitness (PIF) is commonly taken to be subject to a set of simple counterexamples. We argue that three of the most important of these are not counterexamples to the PIF itself, but only to the traditional mathematical model of this propensity: fitness as expected number of offspring. They fail to demonstrate that a new mathematical model of the PIF could not succeed where this older model fails. We then propose a new formalization of the PIF that (...) avoids these (and other) counterexamples. By producing a counterexample-free model of the PIF, we call into question one of the primary motivations for adopting the statisticalist interpretation of fitness. In addition, this new model has the benefit of being more closely allied with contemporary mathematical biology than the traditional model of the PIF. (shrink)

We argue that the economy of nature constitutes an invocation of structure in the biological sciences, one largely missed by philosophers of biology despite the turn in recent years toward structural explanations throughout the philosophy of science. We trace a portion of the history of this concept, beginning with the theologically and economically grounded work of Linnaeus, moving through Darwin’s adaptation of the economy of nature and its reconstitution in genetic terms during the first decades of the Modern Synthesis. What (...) this historical case study reveals, we argue, is a window into the shifting landscape of the explanatory and ontic uses of structural concepts. In Linnaeus, the economy of nature has both ontic and explanatory import; in Darwin the ontic and explanatory aspects start to come apart ; and finally, in the Modern Synthesis, the economy of nature is replaced by the conceptual toolkit of population genetics, the structural elements of which are nearly entirely explanatory. Having traced a historical trajectory of structural concepts that moves from an ontic formulation to an increasingly explanatory one, we conclude by outlining some insights for structural realism. (shrink)

In the atavistic model of cancer progression, tumor cell dedifferentiation is interpreted as a reversion to phylogenetically earlier capabilities. The more recently evolved capabilities are compromised first during cancer progression. This suggests a therapeutic strategy for targeting cancer: design challenges to cancer that can only be met by the recently evolved capabilities no longer functional in cancer cells. We describe several examples of this target‐the‐weakness strategy. Our most detailed example involves the immune system. The absence of adaptive immunity in immunosuppressed (...) tumor environments is an irreversible weakness of cancer that can be exploited by creating a challenge that only the presence of adaptive immunity can meet. This leaves tumor cells more vulnerable than healthy tissue to pathogenic attack. Such a target‐the‐weakness therapeutic strategy has broad applications, and contrasts with current therapies that target the main strength of cancer: cell proliferation. (shrink)

There is a widespread assumption that the universe in general, and life in particular, is 'getting more complex with time'. This book brings together a wide range of experts in science, philosophy and theology and unveils their joint effort in exploring this idea. They confront essential problems behind the theory of complexity and the role of life within it: what is complexity? When does it increase, and why? Is the universe evolving towards states of ever greater complexity and diversity? If (...) so, what is the source of this universal enrichment? This book addresses those difficult questions, and offers a unique cross-disciplinary perspective on some of the most profound issues at the heart of science and philosophy. Readers will gain insights in complexity that reach deep into key areas of physics, biology, complexity science, philosophy and religion. (shrink)

This volume presents a series of essays published by Charles Kahn over a period of forty years, in which he seeks to explicate the ancient Greek concept of ...

This chapter contains sections titled: First period (about 1263–74) Second period (about 1274–89) Third period (1290–1308) Final period (1309–16).

Despite his position as one of the first philosophers to write in the “post- Darwinian” world, the critique of Darwin by Friedrich Nietzsche is often ignored for a host of unsatisfactory reasons. I argue that Nietzsche’s critique of Darwin is important to the study of both Nietzsche’s and Darwin’s impact on philosophy. Further, I show that the central claims of Nietzsche’s critique have been broadly misunderstood. I then present a new reading of Nietzsche’s core criticism of Darwin. An important part (...) of Nietzsche’s response can best be understood as an aesthetic critique of Darwin, reacting to what he saw as Darwin having drained life of an essential component of objective aesthetic value. For Nietzsche, Darwin’s theory is false because it is too intellectual, because it searches for rules, regulations, and uniformity in a realm where none of these are to be found – and, moreover, where they should not be found. Such a reading goes furthest toward making Nietzsche’s criticism substantive and relevant. Finally, I attempt to relate this novel explanation of Nietzsche’s critique to topics in contemporary philosophy of biology, particularly work on the evolutionary explanation of culture. (shrink)

Christians working cross-culturally to bring about change in other societies desire to conduct their interventions ethically. What seems ethical and endorsed by God from the donor's point of view, however, may not be perceived as ethical in terms of the cultural values of the receptors. The nature of this problem is discussed and guidelines suggested to assist us in recognizing and overcoming the problem. The primary guideline in the application of the Golden Rule in terms of the culturally conditioned perception (...) of the receptors. (shrink)

My title is deliberately provocative, since I want to challenge both the chronology and the philosophical interpretation generally accepted for the dialogues called Socratic. I am not primarily interested in questions of chronology, or even in Plato's intellectual ‘development’. But the chronological issues are clear-cut, and it will be convenient to deal with them first. My aim in doing so will be to get at more interesting questions concerning philosophical content and literary design. Interpreters should perhaps think more often about (...) such questions as: Why did Plato write dialogues after all? Why does a little dialogue like the Laches have such a stellar cast, with so many major figures from Athenian history? Why does Plato re-create the schoolboy atmosphere of the Charmides and Lysis? Why does he compose such a large and vivid fencing-match between Socrates and the long-dead Protagoras, in a conversation supposed to have taken place before Plato himself was born? The view which I wish to challenge tends to assume that Plato's motivation in such dialogues was primarily historical: to preserve and defend the memory of Socrates by representing him as faithfully as possible. From this it would seem to follow that the philosophic content of these dialogues must be Socrates' own philosophy, which Plato has piously preserved somewhat in the way that Arrian has preserved the teachings of Epictetus. The counterpart assumption tends to be that when Plato ceases to write as an historian he writes like any other philosopher: using Socrates as a mouthpiece to express whatever philosophical doctrines Plato himself holds at the time of writing. (shrink)

This research seeks to better understand how an organization-related employee perception and job attitude may influence organizational members to ethically create customer value. Specifically, it is proposed that high person–organization fit perception, more precisely ethical values person–organization fit perception, can influence business-to-business salesperson commitment to providing superior customer value both directly and indirectly through trust in sales manager, while encouraging ethical salesforce behavior, an important aspect of communicating and delivering customer value. Results from a study of 408 business-to-business salespeople find (...) that ethical values person–organization fit positively influences salesperson commitment to providing superior customer value, as well as trust in manager. Trust in manager directly affects commitment to customer value and mediates the relationship between ethical values person–organization fit and unethical intent. Theoretical and managerial implications are provided, as well as directions for future research. (shrink)

My title is deliberately provocative, since I want to challenge both the chronology and the philosophical interpretation generally accepted for the dialogues called Socratic. I am not primarily interested in questions of chronology, or even in Plato's intellectual ‘development’. But the chronological issues are clear-cut, and it will be convenient to deal with them first. My aim in doing so will be to get at more interesting questions concerning philosophical content and literary design. Interpreters should perhaps think more often about (...) such questions as: Why did Plato write dialogues after all? Why does a little dialogue like the Laches have such a stellar cast, with so many major figures from Athenian history? Why does Plato re-create the schoolboy atmosphere of the Charmides and Lysis? Why does he compose such a large and vivid fencing-match between Socrates and the long-dead Protagoras, in a conversation supposed to have taken place before Plato himself was born? The view which I wish to challenge tends to assume that Plato's motivation in such dialogues was primarily historical: to preserve and defend the memory of Socrates by representing him as faithfully as possible. From this it would seem to follow that the philosophic content of these dialogues must be Socrates' own philosophy, which Plato has piously preserved somewhat in the way that Arrian has preserved the teachings of Epictetus. The counterpart assumption tends to be that when Plato ceases to write as an historian he writes like any other philosopher: using Socrates as a mouthpiece to express whatever philosophical doctrines Plato himself holds at the time of writing. (shrink)