The UN's capacity for adapting to radical changes of circumstance -- Use of force by the United Nations -- The original parameters of self-defence -- Self-defence against state-sponsored terrorists and infiltrators -- Self-defence against ideological subversion -- Self-defence against attacks on citizens abroad -- Anticipatory self-defence -- Countermeasures and self-help -- The 'purely humanitarian' intervention -- What, eat the cabin boy? Uses of force that are illegal but justifiable