When women and men have approximately equal life...

When women and men have approximately equal life expectancies, it seems to be because women die not only in childbirth (fewer than thought) but about equal from... diseases; poor sanitation and water; inadequate healthcare; and diseases of malnutrition. In industrialized societies, early deaths are caused more by diseases triggered by stress, which breaks down the immune system. It is since stress has become the key factor that men have died so much sooner than women.