Vivisection

One of the earliest sustained arguments against vivisection, written when the practice was rapidly expanding in medical education. Leffingwell did not oppose scientific progress itself but questioned whether the extreme suffering inflicted on animals actually yielded proportional benefits to human medicine. Drawing on case studies, physiological research, and moral philosophy, he challenged the assumption that all knowledge gained through vivisection was justified by its results. The book is striking for its practical tone: Leffingwell was not a sentimentalist but a reformer who believed the medical establishment was making a moral error that would ultimately discredit science. He documents how teaching methods were desensitizing students to cruelty, how some experiments were repeated unnecessarily, and how the actual therapeutic benefits lagged far behind the physiological knowledge acquired. More than a historical document, this is a serious ethical inquiry into a question that remains urgent: what do we owe to creatures who cannot consent?