This document discusses James Rachels' perspective on morality and applies intermediate principles of morality to complex medical cases. It examines cases involving decisions around organ donation for Baby Theresa, separating conjoined twins Jodie and Mary where one may not survive, and euthanizing Tracy Latimer out of compassion for her suffering from a disability. In each case, Rachels considers the principles of promoting benefit, preventing harm, not using people merely as means, and that all lives are equally valuable, as well as the view that killing is generally wrong.