Economic privation proceeds by easy stages, and so long as men suffer it patiently the outside world cares very little. Physical efficiency and resistance to disease slowly diminish, but life proceeds somehow, until the limit of human endurance is reached at last and counsels of despair and madness stir the sufferers from the lethargy which precedes the crisis. The man shakes himself, and the bonds of custom are loosed. The power of ideas is sovereign, and he listens to whatever instruction of hope, illusion, or revenge is carried to them in the air. ... But who can say how much is endurable, or in what direction men will seek at last to escape from their misfortunes?