Abstract

This essay focuses on two philosophical assumptions.According to the first one, biological normativity is not an irreducible property of the living, but rather the living is the historical result of its normative activity. There is therefore a logic of life at work in every living organism that makes it a subject and an agent. It is not the fact that it is already a subject that explains the presence of this logic. It is therefore not impossible to naturalise biological normativity, even if this concept proposed by Georges Canguilhem makes us bifurcate from a world of facts to a world of values.According to the second, we need to extend Varela’s concept of operational closure in order to naturalise biological normativity. We propose a new way of writing it that takes into account the fact that architectural constraints (ϕ1ϕ2) are always at stake in a biological system. By such constraints, we can predict the presence of specific propulsive and repulsive devices in every organism, by which its organisation can be constantly rebuilt, and through which biological disruption can also be amplified.