The science of pain in animals has advanced dramatically in recent decades, establishing that vertebrates and some invertebrates experience pain in ways that are morally significant. Understanding this science strengthens the welfare case.
The science of animal pain has transformed our moral obligations toward other species. The question is no longer whether animals can suffer -- the evidence is overwhelming that they can -- but which animals, in what contexts, and to what degree. This shift in scientific understanding has not yet fully translated into legal and regulatory frameworks, which lag behind the evidence in most countries. Advocates who are fluent in the pain science literature can engage more effectively with policymakers, industry, and researchers who respond to evidence rather than ethical argument alone.