Hmm …

… Dr. Philip Zimbardo: Journeying From Evil to Heroism. (Hat tip, Rus Bowden.)

My own notion of heroism is Conradian, that — in the words of J.B. Priestley — of  "lonely men who find themselves hard-pressed and try to do their duty … unfamiliar and unfashionable heroes who, with some tragic exceptions, are genuinely heroic."