A map of the terrain of ethics -- The Hippocratic Oath and it's challengers: a brief history -- Defining death, abortion, stem cells, and animal welfare: the basis of moral standing -- Problems in benefiting and avoiding harm to the patient -- The ethics of respect for persons: lying, cheating, and breaking promises and why physicians have considered them ethical -- The principle of avoiding killing -- Death and dying: the incompetent patient -- Social ethics of medicine: allocating resources, health insurance, transplantation, and human subjects research -- Human control of life: genetics, birth technologies and modifying human nature -- Resolving conflicts among principles -- The virtues of bioethics.