“Over the years we seem to have become habituated, even addicted, to the notion of radical threat, threat of the kind that can make virtually anything seem expendable if it does not serve an immediate, desperate purpose of self-defense -- as defined by people often in too high a state of alarm to make sound judgments about what real safety would be or how it might be achieved, and who feel that their duty to the rest of us is to be very certain we share their alarm. Putting to one side the opportunities offered by the coercive power of fear, charity obliges me to assume that their alarm is genuine, though i grant that in doing so I again raise questions about the soundness of their judgment.”