Ikhwan al-Safa' (The Brethren of Purity) were the anonymous adepts of a tenth-century esoteric fraternity of lettered urbanites that was principally based in Basra and Baghdad. This brotherhood occupied a prominent station in the history of science and philosophy in Islam due to the wide reception and assimilation of their monumental encyclopaedia: Rasa'il Ikhwan al-Safa' (The Epistles of the Brethren of Purity). This compendium contained fifty-two epistles that offered synoptic explications of the classical sciences and philosophies of the age. Divided (...) into four classificatory parts, it treated themes in mathematics, logic, natural philosophy, psychology, metaphysics and theology, in addition to moral and didactic fables. The Ikhwan were learned compilers of scientific and philosophical knowledge, and their Rasa'il constituted a paradigmatic legacy in the canonization of philosophy and the sciences in mediaeval Islamic civilization. -/- This present volume gathers studies by leading philosophers, historians and scholars of Islamic Studies, who are also the editors and translators of the first Arabic critical editions and first complete annotated English translations of the Rasa'il Ikhwan al-Safa', which will be published in the OUP Series that this present volume initiates, as well as being members of the Editorial Board. -/- The chapters of this present volume explore the conceptual and historical aspects of the philosophical and scientific contents of the Rasa'il and their classification, as well as investigating the authorship and dating of this corpus and the impact that the Ikhwan's intellectual tradition exercised in the unfolding of the history of ideas in Islam. (shrink)

This paper investigates the objections that were raised by the philosopher ‘Abd al-La&tdotu;īf al-Baghdādī against al-&Hdotu;asan ibn al-Haytham’s geometrisation of place. In this line of enquiry, I contrast the philosophical propositions that were advanced by al-Baghdādī in his tract: Fī al-Radd ‘alā Ibn al-Haytham fī al-makān, with the geometrical demonstrations that Ibn al-Haytham presented in his groundbreaking treatise: Qawl fī al-Makān. In examining the particulars of al-Baghdādī’s fragile defence of Aristotle’s definition of topos as delineated in Book IV of the (...) Physics, which was rejected on mathematical grounds by Ibn al-Haytham, a special attention is also given to highlighting the systemic distinctions between the entities that are studied within the speculative physical doctrines of common sense and immediate experience, and the postulated ‘objects’ of scientific and mathematical research. (shrink)

The Ikhwan al-Safa' (Brethren of Purity), the anonymous adepts of a tenth-century esoteric fraternity based in Basra and Baghdad, hold an eminent position in the history of science and philosophy in Islam due to the wide reception and assimilation of their monumental encyclopaedia, the Rasa 'il Ikhwan al-Safa' (Epistles of the Brethren of Purity). This compendium contains fifty-two epistles offering synoptic accounts of the classical sciences and philosophies of the age; divided into four classificatory parts, it treats themes in mathematics, (...) logic, natural philosophy, psychology, metaphysics, and theology, in addition to didactic fables. Epistles 6 to 8 are from the first division of the Epistles, on the propaedeutical and mathematical sciences. Epistle 6 develops ideas concerning natural numbers and their arithmetic, geometric, and harmonic ratios, marked by the influence of Nicomachus of Gerasa and of Euclid. The Brethren here emphasize practical applications of proportionality in music, medicine, and alchemy. Epistle 7 addresses theoretical scientific knowledge as directed towards the spiritual realities of souls, the goal of which is to actualize human potential; this epistle also presents a remarkable classification of sciences. Epistle 8 surveys material cultures in the Islamic mediaeval milieu, embellished by a consideration of the effects of the heavenly bodies on the predisposition of individuals to follow specific trades. These three epistles are, of course, underpinned by the Brethren's perennial tropes of the microcosm/macrocosm analogy and the emanative hierarchy of existents. (shrink)

This is the first critical edition of the first and second Epistles of the Brethren Purity--the Rasa 'il--in Arabic with a fully annotated English translation. It presents technical and epistemic analyses of mathematical concepts and their metaphysical bases, and an overview of the mathematical sciences within Islamic intellectual milieu.

Few figures of the Middle Ages command the attention of so many modern disciplines as Robert Grosseteste (c. 1170-1253). Theology, Philosophy, History, and Science are all areas which his life and thought continue to have significance and to inspire re-interpretation. Accompanied by a series of original commentaries, this new edition of Grosseteste's work, with English translation, draws together the perspectives of modern scientists and medieval specialists. Volume I of a six volume series, Knowing and Speaking presents two of the earliest (...) of Grosseteste's works, the treatises On the Liberal Arts and On the Generation of Sounds. These are accompanied by a significant Middle English treatise on the Seven Liberal Arts whose anonymous fifteenth-century author translated and excerpted passages from Grosseteste's treatises in a re-imagining of their structure and function.0Each work is treated separately within the volume, which is constructed in three parts. On the Liberal Arts sets Grosseteste's thoughts on the arts subjects and emphasises moral concerns about the purpose of learning. On the Generation of Sounds builds on the theories and statements of On the Liberal Arts in connection to the production of sound, elaborating the earlier position, relating the generation of sounds to human vocal and speech production. (shrink)

Examines Avicenna’s phenomenological considerations of the question of being.

THE DISTINCTION BETWEEN ESSENCE AND EXISTENCE has been taken to be central to Avicenna’s metaphysics and ontology of being. Due to the influence that this distinction had on Thomism, and to a lesser extent on Maimonides’s work, some Medievalists and Orientalists took Avicenna’s distinction between essence and existence to be characterized by essentialism. A.-M. Goichon’s books Léxique de la Langue Philosophique d’Ibn Sina, Vocabulaires Comparés d’Aristote et d’Ibn Sina, and La Philosophie d’Avicenne et son Influence en Europe all offer a (...) great contribution to the translation and understanding of Avicenna’s works. However the interpretive reception of Goichon’s works has had a strong influence on subsequent Medievalists as well as Orientalist scholars. This impact on scholars, along with the stress on Avicenna’s influence on Thomism, has led in some instances to an exaggerated stress on the centrality of the essence/ existence distinction in Avicenna’s metaphysics. This state of affairs has eventually overshadowed other important aspects of Avicenna’s ontology of being and of his metaphysical and logical analysis of being in terms of the modalities of necessity, contingency, and impossibility. The examination of Avicenna’s metaphysics under the spell of all of these factors leads to an intellectually discomforting position that construes his ontology as essentialism. Consequently this leads to the interpretation of his work as being that of a metaphysician who subordinates existence to essence. Such interpretation has been even adopted by experts on Avicenna’s work within the Western scholarship as well as among some Arabists. For instance, some scholars stress that Averroes and Mulla Sadra are the metaphysicians of existence, while taking Avicenna to be the metaphysician of essence. John Caputo, a leading interpreter of Heidegger’s thought, makes extensive references to the work of the Thomist scholar Étienne Gilson in the context of examining Aquinas’s adoption of the Avicennian distinction between essence and existence. Caputo’s discussion of the essence/existence distinction adopts the standpoint that Gilson reflects in the reading of Avicenna’s metaphysics as being the starting point of a longstanding essentialist tradition that culminates with Hegel’s Science of Logic. This line of argumentation already supplies Caputo with sufficient arguments that enable him readily to stamp Avicenna’s metaphysics with Heidegger’s critique of the metaphysical tradition. Caputo based himself on what the Thomist scholar Gilson offers in this regard, particularly in taking Aquinas’s metaphysics to be the metaphysics of esse. Gilson’s position may itself be questioned on the ground that its interpretation of Avicenna has been pervaded by Thomist inclinations; this is the case, given that Gilson and other scholars construe Avicenna’s metaphysics as being essentially the metaphysics of essence. Based on this, Caputo accepts the claim that Avicenna’s ontology is essentialist. Such readings lead to the conclusion that Avicenna subordinates existence to essence and consequently that his ontology is characterized by what Heidegger takes to be a mark of the oblivion of being. The question that ought to be raised in this regard is whether the position of secondary scholarly sources is accurate. This is the case, given that some of the scholars, who propagate the claim that Avicenna is an essentialist, are after all scholars who have not consulted or studied the primary sources. Rather, they primarily rely on secondary sources that mediate Avicenna’s metaphysics through the Thomist scholarship and Latin translations. This is clearly the case with Gilson’s consideration of Avicenna’s corpus, which is addressed from the standpoint of Latin renderings of Avicenna’s texts rather than consulting the original Arabic or Persian texts. Having said that, the issue becomes more complicated in the light of considering Arabist or Medievalist scholars who do consult the primary Arabic sources, yet still hold that Avicenna is an essentialist. Such scholars remain under the influence of earlier translations and interpretations that were offered by prominent Orientalist scholars, who addressed the essence/ existence distinction in the light of broad philosophical concerns with Medieval Latin and Jewish philosophy, or by tracing the Aristotelian and Peripatetic influences on Islamic and Arabic philosophy. Some scholars like Gilson might even go further in terms of considering the works of Avicenna and Averroes from the standpoint of mapping out the doctrinal quarrels between Scotism and Thomism. The Medievalists who consult primary sources, yet who are still under the spell of earlier Orientalist views, do not attempt to review some of their positions by going back to a closer examination of the texts and to a questioning reception of dominant translations and interpretations. There is a hermeneutic need to return to the primary texts and to reexamine them in the light of new philosophical concerns. This return and reexamination are also needed in the light of questioning and adopting new methodological inclinations in translation and interpretation. This becomes a pressing issue given the seriousness of the philosophical consequences that might arise if we readily take Avicenna’s metaphysics to be characterized by essentialism. The examination of Avicenna’s ontology must account for the renderings of the terms mahiya, dhat, and wujud, be it in Latin, English, or French, or in terms of the Arabic/persian semantic, syntactic, and grammatical structure and derivation. The nuances of translation are determined by how these terms are philosophically used within the text and in the course of the development of Avicenna’s arguments. Such linguistic investigations would elucidate the philosophical interpretation of the essence/existence distinction in the light of addressing contemporary philosophical concerns, as these are attested with the consideration of Heidegger’s critique of classical ontology. (shrink)

This paper addresses the notion of political theology by way of accounting for modern manifestations of transnational Islamism with a particular emphasis on the establishment of theocratic rule through the contemporary political spheres of praxis in Twelver-Shiism (Shīʿa Ithnā-ʿAsharīyya). This is undertaken by way of giving some principal highlights concerning the conceptual aspects that can be accounted for from the standpoint of political theology in the broad context of Islamist fundamentalist movements. A more detailed focus is also presented in this (...) context on the eschatology that underpins the theocracy of contemporary Twelver-Shiism in terms of its religious outlooks on history, and the conduct of its communal affairs along with the organization of its associated politicized institutions. (shrink)

In this long-awaited treatise, the pre-eminent scholar Muhsin Mahdi gathers the finest findings of four decades of path-breaking research and teaching to reveal Alfarabi as a great philosopher who founded political philosophy in Islam. Mahdi’s impeccable analysis brings to light the principal dimensions of Alfarabi’s intriguing contributions to political thinking and its compelling manifestation in the form of a philosophy of religion that is partly instructed by the Platonic and Aristotelian traditions. A doyen in his discipline, Mahdi eschews the conventional (...) scholarly appeal to secondary literature by refreshingly concentrating his persuasive philosophical effort on textual interpretations of primary sources and recovered manuscripts, and ultimately approaching Alfarabi by way of a measured thinking that investigates the plausible links between revealed religion and political philosophy. (shrink)

In attempting to address the heideggerian Seinsfrage, by way of situating it between the platonic conception of ̉όν in the Sophist and of χώρα in the Timaeus, this paper investigates the ontological possibilities that are opened up in terms of rethinking space. Asserting the intrinsic connection between the question of being and that of space, we argue that the maturation of ontology as phenomenology would not unfold in its furthermost potential unless the being of space gets clarified. This state of (...) affairs confronts us with the exacting ontological task to found a theory of space that contributes to an explication of the question of being beyond its associated temporocentric determinations. Consequently, our line of inquiry endeavors herein to constitute a prologmenon to the elucidation of the question of the being of space as “ontokhorology.”. (shrink)

Although numerous studies have been conducted on the Optics of Alhazen, and on its reception, assimilation and maturation within the course of development of the perspectivae traditions in the history of science and art, ambiguities do hitherto still surround the epistemological and ontological entailments of his theory of visual perception. In addressing this question, our inquiry herein is principally philosophical in scope and our textual reading combines exegesis with hermeneutics. While we observe the delicate procedures of historiography and philology, we (...) do not unguardedly assume that they are exhaustive of all rigorous methods of thoughtful investigation. Moreover, in heeding the internal coherence of Alhazen's text, we do not simply lock his views within reductive contextual chronologies, or readily confine them to epochal matters of textual transmission. Our endeavour is therefore not exclusively set in view of serving the purposes of archival documentation, even if we preserve a thorough and sound sense of historicity. We ultimately recognize the philosophical pertinence of numerous subtle leitmotifs within Alhazen's thinking that speak to us in an effective timely manner, which is significantly relevant in its attuned bearings to the thrust of phenomenological theories of perception. (shrink)

In attempting to address the heideggerian Seinsfrage, by way of situating it between the platonic conception of ̉όν in the Sophist and of χώρα in the Timaeus, this paper investigates the ontological possibilities that are opened up in terms of rethinking space. Asserting the intrinsic connection between the question of being and that of space, we argue that the maturation of ontology as phenomenology would not unfold in its furthermost potential unless the being of space gets clarified. This state of (...) affairs confronts us with the exacting ontological task to found a theory of space that contributes to an explication of the question of being beyond its associated temporocentric determinations. Consequently, our line of inquiry endeavors herein to constitute a prologmenon to the elucidation of the question of the being of space as “ontokhorology.”. (shrink)

This paper consists of critical interrogations and speculative reflections on the ethical bearings of Emmanuel Levinas’ resourceful and intricate views on death, otherness, and time, while illustrating the nature of the philosophical challenges confronting the interpreters of his prolific writings, and investigating their intellectual, moral and political prolongations. This line of inquiry probes the multiple aspects of ethical responsibility that are entailed by the “face-to-face” relation with the other, and their potential theoretical extensions in meditations on the notion of “visage”, (...) particularly in the context of concrete practices and everyday demands. Moreover, this study offers selective analytic parallels with Martin Heidegger’s thoughts on mortality, along with associated pointers by Jean-Paul Sartre, in view of further elucidating the ethical implications of Levinas’ thinking, and exploring their tacit entanglements with politics. (shrink)

This article examines Heidegger’s account of dwelling while placing it in the broad context of a wide array of his lectures and the constellation of his collected writings. The focus on this question is primarily ontological in character, in spite of the spatial significance of the phenomenon of dwelling, and the bearings it has on a variety of disciplines that interrogate its essence, be it in architectural humanities and design or in geography, which probe the various elements of its architectonic (...) and topological underpinnings. The investigation of Heidegger’s reflections on dwelling will be connected in this line of inquiry with his consideration of what he refers to as “the gathering of the fourfold,” namely as “earth, sky, mortals and divinities,” and the manner they are admitted and installed into “things,” all to be set against the background of his meditations on the origins of the work of art, and on the unfolding of the essence of modern technology as en-framing. (shrink)

Cet article se propose de lire la Métaphysique d’Avicenne à la lumière de la thèse heideggérienne de l’oubli de la question de l’être dans l’histoire des ontologies classiques. L’avicennisme est étudié dans le contexte des discussions philosophiques de la phénoménologie herméneutique et de l’ontologique fondamentale, dépassant ainsi le cadre de l’analyse historiographique et philologique. Il est toutefois plus complexe de juger de l’avicennisme en se situant au dehors des limites de son milieu intellectuel, historiquement distant du nôtre, les mésententes risquent (...) de devenir encore plus grandes au vu des débats actuels sur l’ontologie engendrés par la pensée heideggérienne L’approche du point de vue de l’herméneutique phénoménologique moderne s’appuie ici sur les textes avicenniens et s’effectue dans le contexte de la critique tangentielle de l’avicennisme par Heidegger. (shrink)

This paper focuses on the methodological issues related to the obstacles and potential horizons of approaching the philosophical traditions in Islam from the standpoint of comparative studies in philosophy, while also presenting selected case-studies that may potentially illustrate some of the possibilities of renewing the impetus of a philosophical thought that is inspired by Islamic intellectual history. This line of inquiry is divided into two parts: the first deals with questions of methodology, and the second focuses on ontology and phenomenology (...) of perception, by way of offering pathways in investigating the history of philosophical and scientific ideas in Islam from the viewpoint of contemporary debates in philosophy. A special emphasis will be placed on: (a) interpreting the ontology of the eleventh century metaphysician Ibn Sīnā (known in Latin as: Avicenna; d. 1037 CE) in terms of rethinking Heidegger’s critique of the history of metaphysics, and (b) analyzing the philosophical implications of the theory of vision of the eleventh century polymath Ibn al-Haytham (known in Latin as Alhazen; d. ca. 1041 CE) in terms of reflecting on Merleau-Ponty’s phenomenology of perception. (shrink)

Using Shahzad Bashir’s open-access publication A New Vision for Islamic Pasts and Futures as a baseline, this symposium debates whether and how intellectual history can be done otherwise. Mohamed ‘Arafa follows Bashir’s invitation to explore the potential of open-ended historiographies when he thinks about the viability of a flexible method to interpret Sharī ʿ a. Nader El-Bizri interrogates whether the assemblage of personal experiential accounts offered by Bashir can be framed within the discourse of intellectual history at all. Nauman (...) Faizi reads Bashir’s approach as a radical attempt to open up hermeneutical possibilities. Lena Salaymeh suggests that modern aesthetics can contribute to neo-colonial distortions of the Islamic tradition, rather than offering alternatives to positivist historiography. Bashir proposes in his response that academics adopt generosity as an analytical gesture in their academic writing, a generosity that would enable different ways of being human in the world. (shrink)

The Epistles of the Brethren of Purity' is an encyclopedic compendium, probably composed in tenth-century Iraq by a society of adepts with Platonic, Pythagorean, and Shi'i tendencies. Its 52 sections ('epistles') are divided into four parts (Mathematics, Natural Philosophy, Sciences of the Soul and Intellect, and Theology). The current volume provides an edition, translation, and notes to Epistle 3 ('On Astronomia'), which forms one of the 14 sections on Mathematics. The content is a mixture of elementary astronomy and astrology, but (...) it is not a beginner's textbook. Rather, the purpose is to use examples from those disciplines to provide spiritual, moral, and soteriological guidance. Thus the Epistle uses the argument from design to show the necessity for a Creator who made the harmonious universe; this wondrous design is then employed by the authors as a model, providing humans with a paradigm for proper ethical, political, and even economic conduct; and the study of Astronomia helps the soul achieve ultimate happiness as it seeks to throw off the shackles of this mundane world and oppressive body in favour of the purity of the celestial realm.0Although by no means typical of Islamic astronomical literature, Epistle 3 of the Brethren of Purity gives a window into a fascinating and intriguing group operating during the early period of Islam who sought to continue and adopt one of the esoteric strands of Hellenistic philosophy within an Islamic context, meshing astronomy, astrology, Platonic-Pythagorean philosophy, Quranic and Biblical quotations, and anecdotes from the lives of the Abrahamic prophets. (shrink)

Mimicry and deception are two important issues in studies about animal communication. The reliability of animal signs and the problem of the benefits of deceiving in sign exchanges are interesting topics in the evolution of communication. In this paper, we intend to contribute to an understanding of deception by studying the case of aggressive signal mimicry in fireflies, investigated by James Lloyd. Firefly femmes fatales are specialized in mimicking the mating signals of other species of fireflies with the purpose of (...) attracting responding males to become their prey. These aggressive mimics are a major factor in the survival and reproduction of both prey and predator. It is a case of deception through active falsification of information that leads to efficient predation by femmes fatales fireflies and triggered evolutionary processes in their preys’ communicative behaviors. There are even nested coevolutionary interactions between these fireflies, leading to a remarkable system of deceptive and counterdeceptive signaling behaviors. We develop here a semiotic model of firefly deception and also consider ideas advanced by Lloyd about the evolution of communication, acknowledging that deception can be part of the explanation of why communication evolves towards increasing complexity. Increasingly complex sign exchanges between fireflies evolve in an extremely slow pace. Even if deceptive maneuvers are played out time and time again between particular firefly individuals, the evolution of the next level of complexity—and thus the next utterance in the dialogue between species—is likely to take an immense amount of generations. (shrink)

Transdisciplinary research challenges the divide between Indigenous and academic knowledge by bringing together epistemic resources of heterogeneous stakeholders. The aim of this article is to explore causal explanations in a traditional fishing community in Brazil that provide resources for transdisciplinary collaboration, without neglecting differences between Indigenous and academic experts. Semi-structured interviews were carried out in a fishing village in the North shore of Bahia and our findings show that community members often rely on causal explanations for local ecological phenomena with (...) different degrees of complexity. While these results demonstrate the ecological expertise of local community members, we also argue that recognition of local expertise needs to reflect on differences between epistemic communities by developing a culturally sensitive model of transdisciplinary knowledge negotiation. (shrink)

This paper offers a contribution to debates around integrative aspects of systems biology and engages with issues related to the circumstances under which physicists look at biological problems. We use oral history as one of the methodological tools to gather the empirical material, conducting interviews with physicists working in systems biology. The interviews were conducted at several institutions in Brazil, Germany, Israel and the U.S. Biological research has been increasingly dependent on computational methods, high-throughput technologies, and multidisciplinary skills. Quantitative scientists (...) are joining biological departments and collaborations between physicists and biologists are particularly vigorous. This state of affairs raises a number of questions, such as: What are the circumstances under which physicists approach biological problems in systems biology? What kind of interdisciplinary challenges must be tackled? The paper suggests that, concerning physicists’ move to work on biological systems, there are common reasons to move, the transition must be understood in terms of degrees, physicists have a rationale for simplifying systems, and distinct conceptions of model and modeling strategies are recurrent. We identified problems regarding linguistic clarity and integration of epistemological aims. We conclude that cultural unconformities within the systems biology community have important consequences to the flow of scientific knowledge. (shrink)

In this chapter, we will address criticisms to the theory of ecological functions introduced by Nunes-Neto et al. (2014). In doing so, we intend to further develop the theory, as a possible basis for naturalizing the teleological and normative dimensions of ecological functions. We will also take the first steps in the construction of an integrated scientific and ethical approach to sustainability that is intended to avoid an anthropocentric perspective.

Currently there are persistent doubts about the meaning and contributions of the gene concept, mostly related to its interpretation as a stretch of DNA encoding a single functional product, i.e., the classical molecular gene concept. There is, however, much conceptual variation around genes, leading to important difficulties in genetics teaching. We investigated whether and how conceptual variation related to the gene concept and gene function models is present in school science and what potential problems it may bring to genetics teaching (...) and learning. Here, we report results on how ideas about genes and gene function are treated in textbooks and appear in students’ views and, also, about a teaching strategy for improving higher education students’ understanding of scientific models and conceptual variation around genes and their functions. (shrink)

Ethnobiology has become increasingly concerned with applied and normative issues such as climate change adaptation, forest management, and sustainable agriculture. Applied ethnobiology emphasizes the practical importance of local and traditional knowledge in tackling these issues but thereby also raises complex theoretical questions about the integration of heterogeneous knowledge systems. The aim of this article is to develop a framework for addressing questions of integration through four core domains of philosophy - epistemology, ontology, value theory, and political theory. In each of (...) these dimensions, we argue for a model of “partial overlaps” that acknowledges both substantial similarities and differences between knowledge systems. While overlaps can ground successful collaboration, their partiality requires reflectivity about the limitations of collaboration and co-creation. By outlining such a general and programmatic framework, the article aims to contribute to developing “philosophy of ethnobiology” as a field of interdisciplinary exchange that provides new resources for addressing foundational issues in ethnobiology and also expands the agenda of philosophy of biology. (shrink)

In this article, we draw upon the Conceptual Profile Theory to discuss the negotiation of meanings related to the energy concept in an 11th grade physics classroom. This theory is based on the heterogeneity of verbal thinking, that is, on the idea that any individual or society does not represent concepts in a single way. According to this perspective, the processes of conceptualization consist of the use of a repertoire of different socially stabilized signifiers, adjusted to the context in which (...) they occur. We start by proposing zones of a conceptual profile model for energy, each zone being characterized by its own commitments and identifiable by certain modes of talking about energy. Based on classroom evidence, we claim that teachers and students negotiate meanings that interpenetrate the domains of everyday and scientific knowledge. Being inevitable and necessary, this heterogeneity of conceptual thinking needs to be considered in teaching design in order to allow its awareness on the part of the students. We argue that students’ conceptual development goals should be considered in terms of general goals of science education, which points to the need of overcoming the encapsulation of scientific school knowledge. We show that the Conceptual Profile Theory provides a basis for science education that can promote the crossing of cultural boundaries, seeking relations between science and the spheres of everyday life. (shrink)

A recent idea of “ecosystem health” was introduced in the 1970s and 1980s to draws attention to the fact that ecosystems can become ill because of a reduction of properties such as primary productivity, functions and diversity of interactions among system components. Starting from the 1990s, this idea has been deeply criticized by authors who argued that, insofar as ecosystems show many differences with respect to organismic features, these two kinds of systems cannot share a typical organismic property such as (...) health. In recent years, an organisational approach in philosophy of biology and ecology argued that both organisms and ecosystems may share a fundamental characteristic despite their differences, namely, organisational closure. Based on this kind of closure, scholars have also discussed health and malfunctional states in organisms. In this paper, we examine the possibility of expanding such an organisational approach to health and malfunctions to the ecological domain. Firstly, we will see that a malfunction is related to a lower effectiveness in the functional behaviour of some biotic components with respect to other systemic components. We will then show how some introduced species do not satisfactorily interact in an organisational closure with other ecosystem components, thus posing a threat to the self-maintenance of the ecosystem in which they are found. Accordingly, we will argue that an ecosystem can be said to be healthy when it is a vital environment organisationally grounded on its intrinsic capacity to ensure, under favourable conditions, appropriate functional behaviours for ecosystem components and ecosystem self-maintenance. (shrink)