Amidst national debates on abortion, euthanasia, and stem cell research, this book presents a purely scientific and philosophical argument for the moral status of human embryos. Authors Robert P. George and Christopher Tollefsen contend that a fetus, from conception, is a human being with inherent moral and political rights. They argue against embryonic stem cell research, asserting that it constitutes the unacceptable taking of a human life. This work challenges the notion of a 'prepersonal' stage, advocating for the inviolable rights of an embryo.