Forrester discusses animal rights, obligations concerning future generations, abortion, limiting medical treatment, and euthanasia. Persons are defined as individuals who ought to be treated in accordance with all sound moral principles. The author develops an account of what moral principles are sound, how we can apply them to complex situations, and what makes it reasonable to treat individuals in accordance with particular moral principles. This discussion puts the book's practical conclusions on a sounder basis than much other work on practical ethics. Most such authors state some general principles, but say little about why these principles should be accepted. Moreover, they rarely show how general principles