Modern medicine has brought us near miracles. It's also brought us some of the most difficult decisions we'll ever have to face. Are we obliged to prolong life even at the cost of terrible suffering? Should we legalize the sale of organs, such as kidneys, to save the lives of transplant patients? May a woman with a multiple-fetus pregnancy opt for fetal reduction, thus forfeiting the lives of some to possibly save others? When it seems that every available option is morally questionable, how do we decide?