I am a theoretical biologist working at the crossroads of experimental biology, mathematics, and philosophy. I also work on the Anthropocene, among many other interests.
In the last decade, the notion that new possibilities appear over time in biological phenomena has received renewed and growing attention. Kauffman approaches it as the adjacent possible, Sarti and Citti as heterogenesis, and Longo and Montévil as symmetry change and specific objects. Accordingly, there is a growing understanding that this notion is a significant shift and challenge in the way to do science. However, there has yet to be a systematic effort to bring together the different perspectives on this question in biology and in other fields confronted with it. In this conference, we intend to create bridges between the different perspectives that have been developed, mostly independently, on the question of changing possibility spaces in biology.
Perpétuant les orientations impulsées par Jean-Jacques Kupiec lors de sa création, le séminaire Cavaillès se donne pour objet l'histoire et la philosophie des sciences du vivant. Une fois par mois un acteur des sciences expérimentales ou humaines est invité à y présenter ses travaux et réflexions. Le séminaire se veut ouvert à toutes et à tous, avec l'objectif de croiser les regards, partager les connaissances et favoriser les échanges sur un large spectre de thématiques et de questions. Il entend être le témoin de la vitalité, l'actualité et la fertilité des recherches en épistémologie historique des sciences biomédicales, ainsi que de leur incidence sur les débats scientifiques contemporains.
La biologie moléculaire a donné un cadre très fécond pour l’exploration empirique du vivant, mais ses résultats ont aussi et en même temps mis à mal son cadre conceptuel. Pour dépasser ce cadre, un certain nombre d’auteurs soulignent les défis théoriques que comporte la compréhension des êtres vivants dans leur historicité et organicité. Si l’on doit comprendre les êtres vivant comme des organisations biologiques, comment ne pas se perdre dans leur complexité ? Et si leurs régularités sont les résultat d’une histoire et continuent de changer, de produire une histoire, comment les objectiver ? Ces questions sont, nous le pensons, essentielles pour répondre aux défis de ce siècle concernant la santé et la biodiversité et croisent aussi la question de l’encadrement théorique de l’usage des nouvelles technologies dans le travail scientifique. Dans ce contexte, nous inaugurons ici le programme interdisciplinaire : fondations théoriques de la biologie. Notre approche consiste à aborder les questions théoriques en s’appuyant sur la philosophie, notamment l’épistémologie ainsi que la comparaison avec les innovations mais aussi les contraintes théoriques d’autres disciplines, notamment la physique. En s’appuyant sur cette réflexivité, il s’agira à la fois de réinterpréter les pratiques existantes et de développer de nouvelles pratiques et méthodes.
When I first met Bernard Stiegler, he was starting his program in Plaine Commune, a suburb of Paris that mixes misery of all kinds with young and creative vitality.
Abstract
"What I love, and those whom I love, you, that is to say us in so far as we are capable of forming a we, all this I love, and I love them, and I love you infinitely" (Bernard Steigler April 1952- August 2020). When Bernard Stiegler writes "I love you" in the quote above, he openly provokes us to question or experience the meaning or contact of these words. He also invites us to question the relationship between a thinker’s life and their thought. For Stiegler, they were inextricable. His life was one that focused on friendship but not friendships at a purely social level but ones that produced philosophy, politics, and existential truths. Bringing together scholars who knew Stiegler, including Shaj Mohan, Achille Mbembe, Divya Dwivedi, Peter Szendy, and Emily Apter, this volume provides an original - and personal - insight into his life and philosophy. Each piece gives a sense of the wide range of Stiegler’s work and how it affected the praxis of the philosopher in different parts of the world.
In their brave and challenging book, grounded in political science and the Continental philosophical tradition, Divya Dwivedi and Shaj Mohan engage with the resurgence of upper-caste supremacism in India and its justification via the legacy of ‘the Aryan doctrine’ and Hindu nationalism.
Abstract
In their brave and challenging book, grounded in political science and the Continental philosophical tradition, Divya Dwivedi and Shaj Mohan engage with the resurgence of upper-caste supremacism in India and its justification via the legacy of “the Aryan doctrine” and Hindu nationalism. Their essays were written from 2016 to 2023, when India’s democratic institutions were subverted and caste-based oppression overflowed into public space―killing and menacing the lower castes of all religions, minorities, women, students and the media. This book chronicles the ascending oppression of democracy in India, a veritable biography of authoritarianism. Dwivedi and Mohan reject simplistic accounts of India’s politics as the opposition between “Hindu majoritarian nationalism” and “the religious minorities”, or between “Hindu fundamentalism” and “religious pluralism”. They propose instead a genuinely transformative account of Indian politics, grounded in political philosophy and in the lower- caste majority position What does revolution mean where the constitutional promise of equality is betrayed daily by the millennia- old inequality of caste? What does politics mean where religion serves as the justification for descent- based enslavement and indignity? Revolution has only one sense in India, the annihilation of caste; and “citizen” has only one sense, the people of the state shedding caste and racism.
How do mathematical models convey meaning? What is required to build a model? An introduction for biologists and philosophers.
Abstract
Mathematical modeling is a very powerful tool to understand natural phenomena. Such a tool carries its own assumptions and should always be used critically. In this chapter we highlight the key ingredients and steps of modeling and focus on their biological interpretation. In particular, we discuss the role of theoretical principles in writing models. We also highlight the meaning and interpretation of equations. The main aim of this chapter is to facilitate the interaction between biologists and mathematical modelers. We focus on the case of cell proliferation and motility in the context of multicellular organisms.
Keywords: Equations, Mathematical modeling, Parameters, Proliferation, Theory
We characterize biological organization as a closure of constraints, where constraints are defined at a given time scale and are interdependent.
Abstract
We propose a conceptual and formal characterisation of biological organisation as a closure of constraints. We first establish a distinction between two causal regimes at work in biological systems: processes, which refer to the whole set of changes occurring in non-equilibrium open thermodynamic conditions; and constraints, those entities which, while acting upon the processes, exhibit some form of conservation (symmetry) at the relevant time scales. We then argue that, in biological systems, constraints realise closure, i.e. mutual dependence such that they both depend on and contribute to maintaining each other. With this characterisation in hand, we discuss how organisational closure can provide an operational tool for marking the boundaries between interacting biological systems. We conclude by focusing on the original conception of the relationship between stability and variation which emerges from this framework.
Keywords: Biological organisation, Closure, Constraints, Symmetries, Time scales
The evolution of life marks the end of a physics world view of law entailed dynamics. We discuss the notions of causation and of enablement.
Abstract
Biological evolution is a complex blend of ever changing structural stability, variability and emergence of new phe- notypes, niches, ecosystems. We wish to argue that the evo- lution of life marks the end of a physics world view of law entailed dynamics. Our considerations depend upon dis- cussing the variability of the very ”contexts of life”: the in- teractions between organisms, biological niches and ecosys- tems. These are ever changing, intrinsically indeterminate and even unprestatable: we do not know ahead of time the ”niches” which constitute the boundary conditions on selec- tion. More generally, by the mathematical unprestatability of the ”phase space” (space of possibilities), no laws of mo- tion can be formulated for evolution. We call this radical emergence, from life to life. The purpose of this paper is the integration of variation and diversity in a sound concep- tual frame and situate unpredictability at a novel theoretical level, that of the very phase space. Our argument will be carried on in close comparisons with physics and the mathematical constructions of phase spaces in that discipline. The role of (theoretical) symmetries as invariant preserving transformations will allow us to under- stand the nature of physical phase spaces and to stress the differences required for a sound biological theoretizing. In this frame, we discuss the novel notion of ”enablement”. Life lives in a web of enablement and radical emergence. This will restrict causal analyses to differential cases (a difference that causes a difference). Mutations or other causal differ- ences will allow us to stress that ”non conservation princi- ples” are at the core of evolution, in contrast to physical dynamics, largely based on conservation principles as sym- metries. Critical transitions, the main locus of symmetry changes in physics, will be discussed, and lead to ”extended criticality” as a conceptual frame for a better understanding of the living state of matter.
How do mathematical models convey meaning? What is required to build a model? An introduction for biologists and philosophers.
Abstract
Mathematical modeling is a very powerful tool to understand natural phenomena. Such a tool carries its own assumptions and should always be used critically. In this chapter we highlight the key ingredients and steps of modeling and focus on their biological interpretation. In particular, we discuss the role of theoretical principles in writing models. We also highlight the meaning and interpretation of equations. The main aim of this chapter is to facilitate the interaction between biologists and mathematical modelers. We focus on the case of cell proliferation and motility in the context of multicellular organisms.
Keywords: Equations, Mathematical modeling, Parameters, Proliferation, Theory
Le terme de disruption est utilisé largement en biologie, mais il a été peu théorisé. Qu'est ce qui distingue les disruptions des perturbations ou du concept très générique de "disturbances" en écologie? Nous défendrons l'idée que les disruptions demandent de comprendre le vivant à la fois dans son historicité et de manière systémique. Au cours du temps, notamment évolutif, le vivant se transforme et fait apparaître des traits singuliers, qui sont fonctionnels grâce à leurs singularités. Ceci constitue ce que nous avons appelé par ailleurs l'anti-entropie. Alors le premier type de disruption est la randomisation de cette singularité, conduisant à une perte de viabilité, qu'il s'agit toutefois de définir avec précision. Il y a cependant un deuxième type de disruption. Si le premier type correspond à la perte du résultat de l'histoire constituant une organisation, le deuxième type correspond à la perte de la capacité à produire des nouveautés fonctionnelles. Dans les deux cas, les disruptions sont un aspect essentiellement qualitatif de l’Anthropocène et de ce qui atteint à la fois la biodiversité et la santé humaine.
Les biologistes décrivent actuellement une multitude de disruptions ayant lieu à tous les niveaux d’organisation du vivant, humains et non-humains. Ces disruptions proviennent principalement des technologies, qu’il s’agisse de la machine thermique issue de la première révolution industrielle, et du changement climatique subséquent, de la chimie avec notamment les perturbateurs endocriniens qui en sont issus, ou du numérique avec l’immixtion des écrans dans la relation parents-jeunes enfants (dans le cas des humains). Les infidélités du milieu ne sont pas étrangères au vivant comme le soulignait Canguilhem, mais la spécificité de ces disruption est leur rythme qui excède les capacité normative du vivant, humain et non-humain, conduisant à une contrepartie biologique de ce que Stiegler appelait la disruption comme régime actuel des sociétés humaines. Nous insisterons sur les conséquences de ces disruptions concernant le développement humain, biologique et psychique, et nous indiquerons des réponses possibles face à ces disruptions.
L’Association des Amis de la Génération Thunberg-Ars Industrialis (AAGT-AI) a comme objectif de nouer un dialogue intergénérationnel entre le monde académique au sens large et les mouvements de la jeunesse mobilisés face à la catastrophe écologique.
Il ne s’agira pas d’une démocratie mondiale, car il faut que les peuples se composent et se disposent.Mais nous affirmerons une essence démocratique du monde : peuplé par tous les vivants et par tous les parlants, tout entier configuré par leurs existences et par leurs paroles.
Nous sommes un groupe de mathématiciens qui dénonçons une mathématisation du monde orientée vers le contrôle, le quantitatif et le réductionnisme plutôt que vers l’invention et la construction de compréhensions.
PWD 