do differ, biologically, cog- nitively, and behaviorally, no one disputes-although such dif- ferences, it must be stressed, are usually not absolute but appar- ent only as averages when groups of men and women are com- pared. Yet, as psychologist Jeanette McGlone writes, "Questions such as 'Why?' and 'Does it matter?' remain unanswered."
Those two questions, of course, are what the fuss is all about. The staunchest believer in equal opportunities for both sexes will, if he or she is...