‘Animals run about the world in all sorts of paths’: varieties of indeterminism

Abstract

In her seminal essay ‘Causality and Determination’, Elizabeth Anscombe very decidedly announced that “physical indeterminism” is “indispensable if we are to make anything of the claim to freedom”. But it is clear from that same essay that she extends the scope of that claim beyond freedom–she suggests that indeterminism is required already for animal self-movement (a position recently called ‘agency incompatibilism’ by Helen Steward). Building on Anscombe’s conception of causality and (in)determinism, I will suggest that it extends even further: life as such already requires physical indeterminism. Furthermore, I show that we can, on this basis, arrive at the idea of varieties of (in)determinism, along with a corresponding variety of incompatibilist theses. From this Anscombean vantage point, the free will discussion takes on a quite different outlook. The question whether free agency can coexist with determinism on the level of blind physical forces, which preoccupies the philosopher of free will, turns out to conflate a whole series of compatibility questions: not just whether life is compatible with physical determinism, but also whether animal self-movement is compatible with ‘biological determinism’, and whether free agency is compatible with ‘animal determinism’.