Death is deeply personal, generally feared, and wholly inescapable, but medical technology now can prolong our biological existence virtually indefinitely, and, with these advances, comes the question of whether we should pursue the extension of life in all cases. Most people would agree that, under certain circumstances, it would be preferable to cease our hold on life. Nearly everyone can agree that there are situations when terminally ill patients have the right to call for a halt to life-extending treatments, and that their physicians w ....