Advances in animal cognition research — documenting planning, theory of mind, metacognition, and self-awareness across species — are reshaping scientific and philosophical frameworks for assigning moral consideration to different animals.
Animal cognition research provides the empirical foundation for moral circle expansion. As evidence accumulates for increasingly sophisticated mental life across diverse taxa, the burden of proof shifts from demonstrating sentience to justifying exclusion from welfare consideration. This has practical implications for legislation, research ethics, and food system regulation. The precautionary principle argues for extending consideration to animals with credible cognitive evidence even where certainty is incomplete.