Antoine C. Dussault

We argue that ecology in general and biodiversity and ecosystem function research in particular need an understanding of functions which is both ahistorical and evolutionarily grounded. A natural candidate in this context is Bigelow and Pargetter’s evolutionary forward-looking account which, like the causal role account, assigns functions to parts of integrated systems regardless of their past history, but supplements this with an evolutionary dimension that relates functions to their bearers’ ability to thrive and perpetuate themselves. While Bigelow and Pargetter’s account focused on functional organization at the level of organisms, we argue that such an account can be extended to functional organization at the community and ecosystem levels in a way that broadens the scope of the reconciliation between ecosystem ecology and evolutionary biology envisioned by many BEF researchers. By linking an evolutionary forward-looking account of functions to the persistence-based understanding of evolution defended by Bouchard and others, and to the theoretical research on complex adaptive systems, we argue that ecosystems, by forming more or less resilient assemblages, can evolve even while they do not reproduce and form lineages. We thus propose a Persistence Enhancing Propensity account of role functions in ecology to account for this overlap of evolutionary and ecological processes.

Dans cet article, je présenterai la stratégie adoptée par J. B. Callicott pour ancrer l’écocentrisme dans les sciences biologiques et écologiques tout en restant en accord avec la méta-éthique humienne selon laquelle on ne peut directement inférer un jugement portant sur le devoir-être à partir d'un jugement portant sur l'être. Je le ferai en rappelant d’abord quelques caractéristiques importantes de la méta-éthique humienne quant à la relation entre la raison, les émotions et les jugements de valeur. Je montrerai ensuite comment cette méta-éthique, revisitée en relation avec l’explication évolutionnaire de l’éthique, permet de concevoir l’écocentrisme comme une évolution morale. Finalement, ces caractérisations méta-éthiques me permettront de montrer comment Callicott parvient à justifier la supériorité de l’écocentrisme sur les conceptions rivales en s'appuyant sur des considérations scientifiques, mais sans toutefois commettre le sophisme humien consistant à inférer directement des jugements portant sur le devoir-être à partir de jugements portant sur l'être.

Christopher Boorse’s Biostatistical Theory of Health has been the main contender among naturalistic accounts of health for the last 40 years. Yet, a recent criticism of this theory, presented by Elselijn Kingma, identifies a dilemma resulting from the BST’s conceptual linking of health and statistical typicality. Kingma argues that the BST either cannot accommodate the situation- specificity of many normal functions or cannot account for many situation-specific diseases. In this article, we expand upon with Daniel Hausman’s response to Kingma’s dilemma. We propose that recalling Boorse’s specification that health is an intrinsic property of its bearers and explicating this intrinsic property in relation to the concept of homeostasis can illuminate how proponents of naturalistic accounts of health should deal with the situation- specificity of normal functions. We argue that beyond what Boorse and Hausman have delineated, the situation- specificity of normal function cannot be fully captured in a simple dichotomy between normal and abnormal environment or between relevant and irrelevant situations. By bringing homeostasis to the fore of the analysis of health, we set out a richer picture of what the various situations that affect living organisms’ functional performance can be. Accordingly, we provide a broader classification of these various situations which, we contend, better accounts for the main intuitions that philosophers of medicine have sought to accommodate than previous naturalistic theories of health.