The anti-vivisection movement emerged in the nineteenth century as the first organised campaign against animal experimentation, shaping modern animal research ethics, the Three Rs framework, and ongoing policy debates.
The anti-vivisection movement pioneered the idea that animal suffering in laboratories requires moral justification and legal oversight, principles now embedded in research ethics globally. The movement also drove development of alternatives to animal testing through advocacy for replacement technologies. Modern debates have moved beyond abolition versus permissibility toward nuanced questions about which animal models are necessary, which alternatives are scientifically valid, and how welfare standards in research can be continuously improved. The legacy of the movement is visible in the thousands of welfare refinements now standard in research institutions worldwide.