The moral circle - the set of beings whose welfare we consider morally significant - continues to expand through scientific research, legal developments, and shifting public attitudes in 2025-2026.
Moral circle expansion is driven by both scientific evidence and philosophical argument. As evidence accumulates for sentience in more species - fish, cephalopods, insects, and crustaceans - the ethical case for excluding them from moral consideration weakens. Legal frameworks are beginning to reflect this, though unevenly across jurisdictions. Public attitudes are shifting, with growing acceptance that a wide range of animals deserve welfare consideration. This creates opportunities for welfare advocates to advance protection for previously overlooked species.