English title: The Fundations of Normativity by Kant and Spener. In one of the chapters in Conflict of Faculties, Kant presents so-called “Spener’s problem”. Kant refers to the conception of the 17th century theologian Philipp Jakob Spener, concerning the problem of radical moral transformation of individuals. Spener became famous as one of the founders and main exponents of pietistic theology, which in the 18th century became one of the most significant intellectual trends at the University of Königsberg and about which (...) one may assume, that it could influence the evolution of Kantian philosophy. The goal of the article is to compare the main assumptions of Spener’s theology with Kantian theory of moral motivation. The analysis focuses on the possibility of describing the phenomenon of normativity in both conceptions. (shrink)

The article investigates the relationship between Leibniz’s and Huygens’ theory of possibility and the principle of conservation of energy. It assumes that their criticisms of Cartesian views concerning those questions as well as their own achievements contributed to the formation of a new metaphysical basis for modern discussions on the freedom of the will. There are especially two problems whose role is crucial in this context, namely the question of God’s knowledge of future conditionals (contingentia futura) and the mind-body distinction.

Hersz Bad (1869–1942) was Kazimierz Twardowski’s student and belonged to the first generation of the Lvov-Warsaw School members. He specialized in the history of philosophy and led a number of remarkable analyses concerning Kant’s philosophy. At the example of his work one may see, how the methodological postulates of the Lvov Warsaw School were fulfilled at the field of historical philosophical investigations. The goal of the paper is to present Bad’s main achievements and to evaluate their meaning from the point (...) of view of the current state of research of Kant’s philosophy. To be reviewed in detail are Bad’s remarks concerning the scientific status of the so called Kant-Laplace Theory as well as the validity of its name. (shrink)

Anna Szyrwińska geht in ihrem Buch der Frage nach, ob und inwieweit die pietistische Theologie Einfluss auf die Philosophie Immanuel Kants hatte. Ihre historische und systematisch-philosophische Analyse zeigt, dass Kants praktische Philosophie an mehreren Punkten an die pietistische Lehre und vor allem an die Theologie Philipp Jakob Speners anschließt. Weiter ergeben ihre Untersuchungen, dass dies insbesondere für die internalistische Motivationstheorie und die radikal inkompatibilistische Freiheitsvorstellung bei pietistischen Denkern gilt, die sich dann auch bei Kant wiederfinden.

Mental state reasoning or theory-of-mind has been the subject of a rich body of imaging research. Although such investigations routinely tap a common set of regions, the precise function of each area remains a contentious matter. With the help of functional magnetic resonance imaging (fMRI), we sought to determine which areas are involved when processing mental state or intentional metarepresentations by focusing on the relational aspect of such representations. Using non-intentional relational representations such as spatial relations between persons and between (...) objects as a contrast, the results ascertained the involvement of the precuneus, the temporal poles, and the medial prefrontal cortex in the processing of intentional representations. In contrast, the anterior superior temporal sulcus and the left temporo-parietal junction were implicated when processing representations that refer to the presence of persons in relational contexts in general. The right temporo-parietal junction, however, was specifically activated for persons entering spatial relations. The level of representational complexity, a previously unexplored factor, was also found to modulate the neural response in some brain regions, such as the medial prefrontal cortex and the right temporo-parietal junction. These findings highlight the need to take into account the critical roles played by an extensive network of neural regions during mental state reasoning. (shrink)

This article is both an elaborated critique on the one-sided analysis of the misogynist nature of ballet as a cultural practice, and a contribution to a more embodied feminist theory. Based on empirical material, that was brought together by observing the body practices in ballet and listening to the life stories of dancers, the author explores the contradictions that the body in ballet provokes. In describing the embodied experiences ofprofessional ballet dancers she shows that ballet offers women the possibility to (...) transcend the discontinuity of body, mind and emotions. (shrink)

This book surveys research in quantification starting with the foundational work in the 1970s. It paints a vivid picture of generalized quantifiers and Boolean semantics. It explains how the discovery of diverse scope behavior in the 1990s transformed the view of quantification, and how the study of the internal composition of quantifiers has become central in recent years. It presents different approaches to the same problems, and links modern logic and formal semantics to advances in generative syntax. A unique feature (...) of the book is that it systematically brings cross-linguistic data to bear on the theoretical issues, discussing French, German, Dutch, Hungarian, Russian, Japanese, Telugu (Dravidian), and Shupamem (Grassfield Bantu), and pointing to formal semantic literature involving quantification in around thirty languages. -- -/- 1. What this book is about and how to use it; 2. Generalized quantifiers and their elements: operators and their scopes; 3. Generalized quantifiers in non-nominal domains; 4. Some empirically significant properties of quantifiers and determiners; 5. Potential challenges for generalized quantifiers; 6. Scope is not uniform and not a primitive; 7. Existential scope versus distributive scope; 8. Distributivity and scope; 9. Bare numeral indefinites; 10. Modified numerals; 11. Clause-internal scopal diversity; 12. Towards a compositional semantics of quantifier words. (shrink)

Offers a fundamental reexamination of Plato's ethical thought, highlighting the differences between ancient & modern assumptions & stressing the need to be ...

Do the new sciences of well-being provide knowledge that respects the nature of well-being? This book written from the perspective of philosophy of science articulates how this field can speak to well-being proper and can do so in a way that respects the demands of objectivity and measurement.

Julia Annas offers a new account of virtue and happiness as central ethical ideas. She argues that exercising a virtue involves practical reasoning of the kind we find in someone exercising an everyday practical skill, such as farming, building, or playing the piano. This helps us to see virtue as part of an agent's happiness or flourishing.

American healthcare -- Bioterror and bioart -- State of emergency -- Licensed to torture -- Hunger strikes -- War -- Cancer -- Drug dealing -- Toxic tinkering -- Abortion -- Culture of death -- Patient safety -- Global health -- Statue of security -- Pandemic fear -- Bioidentifiers -- Genetic genocide.

This is the first comprehensive overview of the influence of Platonism on the English literary tradition, showing how English writers, including Chaucer, Shakespeare, Milton, Blake, Wordsworth, Yeats, Pound and Iris Murdoch, used Platonic themes and images within their own imaginative work.

According to Johansson (2009: 22) an infinite regress is vicious just in case “what comes first [in the regress-order] is for its definition dependent on what comes afterwards.” Given a few qualifications (to be spelled out below (section 3)), I agree. Again according to Johansson (ibid.), one of the consequences of accepting this way of distinguishing vicious from benign regresses is that the so-called Russellian Resemblance Regress (RRR), if generated in a one-category trope-theoretical framework, is vicious and that, therefore, the (...) existence of tropes only makes sense if trope-theory is understood (minimally) as a two-category theory which accepts, besides the existence of tropes, also the existence of at least one universal: resemblance.1 I disagree. But how can that be? How can Johansson and I agree about what distinguishes a vicious from a benign regress, yet disagree about which regresses are vicious and which are benign? In this paper I attempt to answer that question by first setting out and defending the sense of viciousness which both Johansson and I accept, only to then argue that to be able to determine if a particular regress is vicious in this sense, more than features intrinsic to the regress itself must be taken into account. This is why, although the RRR as originally set out by Russell is vicious, the seemingly identical resemblance regress which ensues in a one-category (standard) trope-theoretical context is not (provided, that is, that we accept certain views about how the nature of tropes relates to the resemblance between tropes, and given that we set our theory in a truthmaker theoretical framework – all of which are standard assumptions for proponents of (the standard-version of) the trope-theory).2. (shrink)

Despite much philosophical attention on forgiveness itself, the phenomenon of un-forgiving is relatively neglected. Some views of forgiveness commit us to denying that we can ever permissibly un-forgive. Some go so far as to say the concept of un-forgiving is incomprehensible—it is the nature of forgiveness to be permanent. Yet many apparent cases of un-forgiving strike us as both real and justified. In what follows, I will address the latter view, that genuine un-forgiving is impossible or incomprehensible as a phenomenon, (...) advanced by a character I will call the “Un-Forgiving Denier.” I address two views which purport to describe candidate un-forgiving cases in alternative ways and deny that any candidate un-forgiving cases are truly cases of un-forgiving: the “epistemic invalidation” and “new forgiveness opportunity” views. In creating problems for those views, I hope to defend the possibility of genuine un-forgiving. Even if it’s possible to respond to the “Un-Forgiving Denier,” a defender of genuine un-forgiving still faces the “Un-Forgiving Critic,” who insists that un-forgiving, while possible, is morally indefensible. Against this view, I argue that un-forgiving enables an ideal of forgiveness wherein victims hold wrongdoers accountable for their moral development and allows certain opportunities for relational repair. I conclude that there is good reason to think un-forgiving is both possible and permissible. Embracing genuine un-forgiving puts constraints on how we should theorize about forgiveness itself and gives us an additional tool for understanding and navigating our relationships. (shrink)

The book provides a commentary on Plato's Republic which encourages the reader to be stimulated to philosophical thinking by Plato's wide-ranging discussions.

Edited by one of the most renowned scholars in the field, Voices of Ancient Philosophy: An Introductory Reader is a unique and accessible introduction to the richness of ancient philosophy. Featuring a topical--as opposed to chronological--organization, this text introduces students to the wide range of approaches and traditions in ancient philosophy. In each section Annas presents the ancient debates on a particular philosophical topic, drawing on a greater diversity of ancient sources than a chronological approach allows. The book is divided (...) into six sections: Fate and Freedom; Reason and Emotion; Knowledge, Belief, and Skepticism; Metaphysical Questions; How Should You Live?; and Society and the State. Annas includes a generous selection of the works of Plato and Aristotle, as well as those of the Stoics, Epicureans, and Skeptics. She also includes selections from less familiar philosophers and from authors in whose works philosophical issues arise, such as poets, medical writers, historians, and Jewish and Christian writers. The volume features biographical sketches of the philosophers, a timeline, and short discussions of the major movements in ancient philosophy. An excellent text for courses in ancient philosophy and history of philosophy, Voices of Ancient Philosophy: An Introductory Reader will also be of interest to scholars and general readers. (shrink)

In this book I look at the tradition of eudaimonistic ethics which stems from Aristotle's treatment of ethics, and which takes distinct, though related forms in Epicurus, the Stoics and the Sceptics. I look at this tradition from different points of view: how is it related to human nature, how does it account for other-related virtue and action, and how much does it require in terms of revising previously held priorities. I discuss the methodology of discussing ancient texts in ways (...) that relate them to contemporary concerns, particularly the importance of respecting the texts and avoiding anachronism. (shrink)

The 1994 US spectrum auction is now a paradigmatic case of the successful use of microeconomic theory for policy-making. We use a detailed analysis of it to review standard accounts in philosophy of science of how idealized models are connected to messy reality. We show that in order to understand what made the design of the spectrum auction successful, a new such account is required, and we present it here. Of especial interest is the light this sheds on the issue (...) of progress in economics. In particular, it enables us to get clear on exactly what has been progressing, and on exactly what theory has – and has not – contributed to that. This in turn has important implications for just what it is about economic theory that we should value. (shrink)

Kimberlé Williams Crenshaw ends her landmark essay “Mapping the Margins: Intersectionality, Identity Politics, and Violence against Women of Color” with a normative claim about coalitions. She suggests that we should reconceptualize identity groups as “in fact coalitions,” or at least as “potential coalitions waiting to be formed.” In this essay, I explore this largely overlooked claim by combining philosophical analysis with archival research I conducted at the Gay, Lesbian, Bisexual and Transgender Historical Society Archive in San Francisco about Somos Hermanas, (...) the solidarity project of the Alliance Against Women’s Oppression, based in the San Francisco Women’s Building (1984–90). I extend my analysis into the present by drawing on the oral history and published works of Carmen Vázquez, a key organizer in both Somos Hermanas and the Women’s Building. I argue that conceptualizing identities as in fact coalitions—as complex, internally heterogeneous unities constituted by their internal differences and dissonances and by internal as well as external relations of power—enables us to organize effective political coalitions that cross existing identity categories and to pursue a liberatory politics of interconnection. (shrink)

Outlines of Scepticism, by the Greek philosopher Sextus Empiricus, is a work of major importance for the history of Greek philosophy. It is the fullest extant account of ancient scepticism, and it is also one of our most copious sources of information about the other Hellenistic philosophies. Its first part contains an elaborate exposition of the Pyrrhonian variety of scepticism; its second and third parts are critical and destructive, arguing against 'dogmatism' in logic, epistemology, science and ethics - an approach (...) that revolutionized the study of philosophy when Sextus' works were rediscovered and published in the sixteenth century. This volume presents the accurate and readable translation which was first published in 1994, together with a substantial new historical and philosophical introduction by Jonathan Barnes. (shrink)

Although research on epistemic injustice has focused on the effects of prejudice in epistemic exchanges, the account of prejudice that emerges in Fricker’s (2007) view is not completely clear. In particular, I claim that the epistemic role of prejudice in the structure of testimonial justification is still in need of a satisfactory explanation. What special epistemic power does prejudice exercise that prevents the speaker’s words from constituting evidence for the hearer’s belief? By clarifying this point, it will be possible to (...) address two more general issues concerning the nature of prejudice: its resistance to counterevidence and the steps involved in overcoming prejudice. I propose a hinge account of prejudice, based on the recent perspective of hinge epistemology, to help clarify these aspects. According to the hinge account, prejudices share a fundamental feature with hinges: they work as norms of evidential significance, and as such, they determine what can and cannot count as evidence for belief. (shrink)

Making decisions can be tough, but how do you know it s the right one and how can you be sure that unconscious biases aren t distorting your thinking? In Risky Business, Anna Withers and Mark Withers draw on decades of research in the fields of psychology, behavioral economics and neuroscience to explain why are so-called rational brains are frequently fooled by over 100 powerful unconscious biases. At the same time they provide a straightforward framework everyone can use, where (...) these biases are embodied into eight memorable characters that help us to avoid these pitfalls and make better decisions.". (shrink)

In this Introduction we introduce the central themes of the Evaluative Perception volume. After identifying historical and recent contemporary work on this topic, we discuss some central questions under three headings: (1) Questions about the Existence and Nature of Evaluative Perception: Are there perceptual experiences of values? If so, what is their nature? Are experiences of values sui generis? Are values necessary for certain kinds of experience? (2) Questions about the Epistemology of Evaluative Perception: Can evaluative experiences ever justify evaluative (...) judgments? Are experiences of values necessary for certain kinds of justified evaluative judgments? (3) Questions about Value Theory and Evaluative Perception: Is the existence of evaluative experience supported or undermined by particular views in value theory? Are particular views in value theory supported or undermined by the existence of value experience? (shrink)

There has recently been a resurgence of philosophical and scientific interest in the foundations of self-consciousness, with particular focus on its altered, anomalous forms. This paper looks at the altered forms of self-awareness in Depersonalization Disorder (DPD), a condition in which people feel detached from their self, their body and the world (Derealisation). Building upon the phenomenological distinction between reflective and pre-reflective self-consciousness, we argue that DPD may alter thetransparencyof basic embodied forms of pre-reflective self-consciousness, as well as the capacity (...) to flexibly modulate and switch between the reflective and pre-reflective facets of self-awareness. Empirical evidence will be invoked in support of the idea that impaired processing of bodily signals is characteristic of the condition. We provide first-hand subjective reports describing the experience of self-detachment or fracture between an observing and an observed self. This split is compared with similar self-detachment phenomena reported in certain Buddhist-derived meditative practices. We suggest that these alterations and changes may reveal the underlying and tacit transparency that characterises the embodied and basic pre-reflective forms of self-consciousness, in the same way that a crack in a transparent glass may indicate the presence of an unnoticed window. (shrink)

In March 1930, Alfred Tarski visited Vienna and delivered few lectures which presented the achievements of the logical branch of the Lvov-Warsaw School. Rudolf Carnap was one of the most careful listeners of these lectures. The same year, in November, Carnap, invited by the Warsaw Philosophical Society, visited Warsaw where he gave three lectures. This was an opportunity for him to meet such members the Lvov-Warsaw School as Jan Łukasiewicz, Stanisław Leśniewski, Tadeusz Kotarbiński, and others. Many years later, Carnap reminisced (...) that he left Warsaw “grateful for many stimulating suggestions and the fruitful exchange of ideas”.In the paper, I reconstruct the details of Carnap’s visit in Warsaw based on Carnap’s diaries, reports published in the Polish Journal Ruch Filozoficzny [Philosophical Movement] and some correspondence. I also discuss some problems presented by Carnap in Warsaw lectures and compare his views to the positons of members of the Lvov-Warsaw School. These problems are: the foundations of psychology, the status of metaphysical sentences, and the character of reasoning. (shrink)

This book intervenes in the field of intersectionality studies: the integrative examination of the effects of racial, gendered, and class power on people’s lives. While “intersectionality” circulates as a buzzword, Anna Carastathis joins other critical voices to urge a more careful reading. Challenging the narratives of arrival that surround it, Carastathis argues that intersectionality is a horizon, illuminating ways of thinking that have yet to be realized; consequently, calls to “go beyond” intersectionality are premature. A provisional interpretation of intersectionality (...) can disorient habits of essentialism, categorial purity, and prototypicality and overcome dynamics of segregation and subordination in political movements. -/- Through a close reading of critical race theorist Kimberlé Williams Crenshaw’s germinal texts, published more than twenty-five years ago, Carastathis urges analytic clarity, contextual rigor, and a politicized, historicized understanding of this widely traveling concept. Intersectionality’s roots in social justice movements and critical intellectual projects—specifically Black feminism—must be retraced and synthesized with a decolonial analysis so its radical potential to actualize coalitions can be enacted. (shrink)

The volume uncovers the most pragmatic and pragmatist aspects of Ludwig Wittgenstein’s philosophy, particularly of On Certainty, through a comparison with the pragmatist tradition as expressed by Charles S. Peirce and William James. On Certainty is often described as 'pragmatic' in literature and this pragmatic aspect is said to characterize a new turn in its author’s thought. Yet, what is still missing is a study of what specifically are the features which make these writings 'sound like pragmatism', as Wittgenstein himself (...) put it (OC 422). The book therefore aims to verify if and to what extent it is possible to sustain that there is an objective convergence between his thought and pragmatism. In doing so, the volume also proposes a clarification of the main differences between Peirce’s and James’ vision of some key ideas of classical pragmatism like doubt and certainty, common sense, the pragmatic maxim, action. Among the achievements of the work are: an analysis of Wittgenstein’s first mention of pragmatism; some pieces of evidence in favour of the hypothesis that Wittgenstein did read some works by Peirce; a documented investigation on the relevance of Frank Ramsey for the development of Wittgenstein’s idea of pragmatism. The volume does not sustain the thesis that Wittgenstein was a pragmatist (nor the opposing thesis that he was not), but highlights the objective convergences and the divergences between his perspective and pragmatism through a balanced analysis running both on an exegetical and on a theoretical level. (shrink)

This important new work surveys the source and ramifications of the famed Nuremburg Code -- recognized around the world as one of the cornerstones of modern bioethics.

Kann der christliche Glaube an Gott in einer der Freiheit verpflichteten Moderne bedeutsam sein? Wie kann man von Gott sprechen unter dem Anspruch der Autonomie der Vernunft? Die Studie gibt darauf eine Antwort mittels einer Analyse der genealogischen Rekonstruktionen von Moderne, wie sie die Philosophen Hermann Krings und Herbert Schnädelbach vorgelegt haben. Dabei zeigt sich, dass es innertheologische Momente waren, die am Ende des Spätmittelalters die Moderne freigesetzt haben. So lässt sich die Moderne als eine Epoche begreifen, in der der (...) Glaube nochmals radikalisiert hermeneutisch erschlossen werden kann." --provided by publisher, back cover. (shrink)

The article presents interpersonal relations and mutual influences between German logician Heinrich Scholz and Polish scholars, first of all Jan Łukasiewicz. The background for presenting these relationships consists of reflections on the development of logic in Poland and various conceptions of how to apply logic to philosophical issues. Firstly, Jan Łukasiewicz’s program of logicisation of philosophy and his search for allies is presented. Secondly, the forms of cooperation between Łukasiewicz and Scholz, as well as contacts between the latter and other (...) Polish scholars are sketched. Finally, forms of Scholz’s help to Polish friends during the tumultuous period of World War II are examined. The article provides also some reflections on the approach to logic in various European centers of analytic philosophy and historical comments on the continuity of philosophical and logical schools. (shrink)

Science increasingly deals with human behavior: biology, neuroscience, genetics, psychology, evolutionary theory, and ethology all bring new insights into our actions and uncover new facts about our agency. However, what is the philosophical significance of their findings? The answer to this question varies according to one's background philosophical views. On the one hand, the dominant empiricist view contends that the sciences can in principle tell us everything there is to know about human agency. On the other hand, there are other (...) non-empiricist views - such as Kantian or Aristotelian perspectives - which hold that although science can contribute to our understanding of agency, agency itself cannot be reduced to mere scientific facts. This collection of original essays brings together a number of experts from different philosophical fields (history of philosophy, philosophy of action, ethics, and philosophy of science) to discuss how recent scientific developments about human behavior may be interpreted by, and may be relevant for, non-empiricist conceptions of agency. Contributors share the project of reconciling the scientific and the manifest images of the world in order to reach a stereoscopic vision of reality, with the conviction that philosophy is an attempt to establish coherence among our beliefs, while taking, at least prima facie, all the aspects of our experience at face value. (shrink)

Edward Osborne Wilson sformułował hipotezę biofilii, według której biofilia jest tendencją do skupiania się na życiu i procesach podobnych do życia. Status tej hipotezy jest kontrowersyjny zarówno w naukach przyrodniczych, społecznych i środowiskowych, jak i w etyce ekologicznej. Na płaszczyźnie metodologicznej stawiany jest m.in. zarzut niefalsyfikowalności; etycy ekologiczni krytykują hipotezę za jej antropocentryczne implikacje. W artykule proponujemy filozoficzną interpretację biofilii jako formy biomorfizmu, według którego pojęcie bytu substancjalnego, wartości i normy moralności jest oparte na paradygmacie bytu żywego.

In this paper the author compares the concept of a Noh play, Matsukaze, with a Slovak altar painting from Košice Cathedral. The article uses Japanese Noh, where stage continuity has been preserved up until the present day, to reconstruct European medieval stage practices reflected in 15th century painting. Referring to the platonic tradition, the second speech represents a corrective to the first, thus legitimizing a sense of passion in the process leading to catharsis, or enlightenment.

Der interdisziplinar angelegte Sammelband diskutiert die materiellen und historischen Verfasst- und Bedingtheiten von Modellen und Modellvorstellungen. Die hier versammelten historischen Miniaturen beleuchten nicht nur das Verhaltnis von Modell und Risiko, sondern werfen zugleich Schlaglichter auf den in wissenshistorischer Perspektive vergleichsweise vernachlassigten Gebrauch von Modellen in Kulturen der Vormoderne. Modelle, so die den Band pragende Kernthese, dienen der Bewaltigung epistemologischer Risiken. Sie machen das Unwagbare wagbar, gewahren Zugriff auf das Potenzielle und Kontingente, vermitteln zwischen der Faktizitat des Gegebenen und der sie (...) erfassenden Theoriebildung. Eben weil Modelle erst im dynamischen Zusammenspiel mit ihrer epistemischen Umgebung Bedeutung erhalten, stellt sich die Frage, inwiefern historische Modellbildung und -anwendung durch differierende asthetische, kulturelle oder politische Momente gepragt sind, die ihre jeweilige Transfer- und Vermittlungsfunktion mitbestimmen. In den Beitragen dieses Bandes werden anhand von Fallstudien ganz unterschiedliche epistemologische Konfigurationen im Spannungsfeld von Modell + Risiko untersucht. (shrink)

This monograph examines the origins of modern and modernist moral confusion and the deterioration of the Judeo-Christian values and contemporary boundaries between Right and Wrong. It traces the ethical shift to the ideas of Hobbes and Bentham, the peculiar universe of Schopenhauer and Dostoevsky, the new religion of Tolstoy and the destroyed God of Nietzsche, ending with the psychoanalytical commandments of Freud and the mire of sexual identity of Foucault and Paglia.

The physical properties of color and its influence on the organism -- The source of the myths about experience : the principle of the being and thinking identity.

The chapter explores some aspects of the relationship between self-consciousness and consciousness of others, by looking in particular at the phenomenology of social anxiety disorder. More specifically, drawing on the phenomenological distinction between pre-reflective and reflective self-consciousness, and its application to the study of schizophrenia spectrum disorders, I suggest that the disturbances of social experience characteristic of social anxiety disorder are rooted in certain alterations of self-experience, and I endeavour to provide an account of the latter. More specifically, I claim (...) that a) pathological social anxiety involves a heightening of the subject’s reflective self-consciousness, and b) that this, at least partly, originates in the experience of a low sense of self-worth, which I refer to as low “self-esteem”, and conceive of as a particular kind of background affective orientation. (shrink)

Bernard Bolzano (1781–1848) is commonly thought to have attempted to develop a theory of size for infinite collections that follows the so-called part–whole principle, according to which the whole is always greater than any of its proper parts. In this paper, we develop a novel interpretation of Bolzano’s mature theory of the infinite and show that, contrary to mainstream interpretations, it is best understood as a theory of infinite sums. Our formal results show that Bolzano’s infinite sums can be equipped (...) with the rich and original structure of a non-commutative ordered ring, and that Bolzano’s views on the mathematical infinite are, after all, consistent. (shrink)