The essential question regarding the issue of abortion is this: can the unborn be properly considered human and are we therefore under an obligation to protect them? If this can be answered, we can begin to consider the social and political issues surrounding abortion. The Nature and Rights of the Unborn Human rights are contingent on being human—something that has always been implicit, but never fully defined except in the sphere of philosophy or in a strictly biological sense. In the past, a clear definition wasn’t necessary, because no one was thinking about existence before birth or what makes us different from machines and so forth. As science has progressed, however, we’ve been forced to consider our own humanity because of how deeply we understand our biology, including our development from a fertilized egg, and of how frequently in science the lines between material and abstract existence are blurred. Ethics in science aside, abortion is probably the most notable scenario...