Expanding the Moral Circle: The History and Future of Animal Welfare Progress

The moral circle — the set of beings whose interests we consider morally — has expanded throughout history. Understanding this history helps advocates work effectively for further expansion.

Key Facts

The RSPCA founded in 1824 was the first animal protection organization in the world, reflecting growing 19th-century concern for animal suffering
Peter Singer published Animal Liberation in 1975, providing philosophical grounding that helped launch the modern animal rights movement
The EU recognized animal sentience in the Amsterdam Treaty of 1997, the first major international treaty to do so
Surveys consistently show that younger generations express stronger moral concern for animals than older generations
The Cambridge Declaration on Consciousness (2012) represented scientific consensus expansion on which animals can suffer

Welfare Considerations

The history of moral circle expansion for animals is a history of persistent advocacy meeting changing social conditions. Factory farming became concealed from public view just as animal welfare concern was rising — much subsequent progress has been about making the hidden visible. Legal recognition of animal sentience, corporate welfare commitments, and the growth of plant-based food all reflect ongoing expansion. The trajectory gives grounds for cautious optimism, but progress requires active advocacy — it does not happen automatically.

What You Can Do

Learn the history of the animal welfare movement to understand what strategies have driven progress
Engage with effective altruism and animal advocacy literature on how to maximize your welfare impact
Support organizations that work on changing cultural norms around animals alongside policy change
Mentor people new to animal welfare advocacy to grow the movement
Share compelling, evidence-based content about animal welfare with your social network to build awareness