Welfare Science

Moral Circle Expansion and Animal Welfare

The concept of the moral circle - the range of beings whose interests are considered morally significant - is expanding to include a wider range of animal species with important welfare implications.

Key Facts

Peter Singer's Animal Liberation (1975) catalysed widespread moral consideration of animals
Cognitive and neuroscience research increasingly supports broad animal sentience
Cambridge Declaration on Consciousness (2012) was a landmark scientific statement
Public moral concern for animals has grown significantly in recent decades
Effective altruism has directed significant philanthropic resources toward animal welfare

Welfare Considerations

Expanding moral consideration to more animal species - including invertebrates and farmed fish - is essential to addressing the full scale of animal suffering in the world. Evidence-based advocacy for moral circle expansion drives welfare improvements across multiple sectors.

What You Can Do

Learn about the evidence for sentience in less familiar animal groups
Engage thoughtfully with arguments for expanding moral consideration of animals
Support research into sentience and cognitive abilities in understudied species
Discuss moral circle expansion with friends and family in non-confrontational ways
Support organisations that advocate based on evidence for all animals' welfare