“The line between moral behavior and narcissistic self-righteousness is thin and difficult to discern. The man who stands before a crowd and proclaims his intention to save the seas is convinced that he is superior to a man who merely picks up his own and other people’s litter on the beach, when in fact the latter is in some small way sure to make the world a better place, while the former is likely to be a monster of vanity whose crusade will lead to unintended destruction.”