Rachels proposes a minimum conception of morality that focuses on impartial consideration of individuals' interests and making decisions guided by reason rather than feelings. He analyzes three medical ethics cases - Baby Theresa, conjoined twins Jodie and Mary, and Tracy Latimer who had cerebral palsy. For each case, he outlines various moral arguments and principles that could apply, such as whether it is wrong to use people as means, kill one to save others, or discriminate against the handicapped. Throughout, he emphasizes the importance of impartiality, examining implications carefully, and accepting only principles that can be justified by reasons.