WHP Logo

The White Horse Press

Environmental Values

Contents of Volume 20

Other volumes of EV

Environmental Values

Ethical Extensionism under Uncertainty of Sentience: Duties to Non-Human Organisms without Drawing a Line

Kai M.A. Chan

Environmental Values 20 (2011): 323-346. doi: 10.3197/096327111X13077055165983


Ethical extensionism generally involves drawing one or more lines of moral standing. I argue (i) for all living organisms, there is a non-zero probability of sentience and consciousness, and (ii) we cannot justify excluding beings from consideration on the basis of uncertainty of their sentience, etc., and rather we should incorporate this uncertainty into the strength of our moral responsibilities. This use of probabilities differs critically from multi-criteria theories of moral standing and those that assign benefit of the doubt, which involve unjustified exclusions and dilutions of duties. From uncertainty rises certainty: we have duties to non-human organisms, although they may often be minor. This modification of extensionist ethics provides foundation for an environmental ethic that parallels interpersonal and animal welfare ethics, and it suggests that we owe much greater concern to 'lower' organisms than they are typically given.


Moral considerability, extensionism, consciousness, animals, the Golden Rule

CITATIONS in other Environmental Values articles

Editorial: To Act or Not to Act? Katie McShane

Download full text (PDF format) from IngentaConnect. Access is free if your institution subscribes to Environmental Values.

Subscriptions and back numbers of Environmental Values.

Other papers in this volume

The Old Vicarage, Winwick
Cambridgeshire, PE28 5PN, UK
Tel: +44 1832 293222