And so that Chautauqua morning I experienced both the worst and best of human nature, almost simultaneously. This is who we are as a species: We contain within ourselves both the possibility of murdering an old stranger for almost no reason—the capacity in Shakespeare’s Iago which Coleridge called “motiveless Malignity”—and we also contain the antidote to that disease—courage, selflessness, the willingness to risk oneself to help that old stranger lying on the ground.

