Throughout recorded history, a series of seemingly unrelated ideas have bee
n consistently intertwined: suicide, euthanasia, infanticide, eugenics, gen
ocide and, most recently, the practice termed physician-assisted suicide. F
rom Plate and Hippocrates to a pair of twentieth-century American physician
s named Haiselden and Kevorkian, an examination of history shows these disp
arate notions always involve two troublesome questions: Which lives are not
worth living? And who will decide? The same examination of history teaches
that separating the worthy from the not worthy is a very dangerous proposi
tion, especially for those whose lives are deemed marginal.