Is war necessary? Can some conflicts only be solved by violence? Human history is indeed often presented as primarily a history of wars and battles, conquests and defeats. While that is only one perspective amongst many possible ones, violence of one sort or another has certainly been, if not centre-stage, at least lurking in the wings throughout the human story. Man (especially Man, but also Woman) clearly has the propensity not only to behave aggressively to other humans but also to do so in an organized way and not infrequently with calculated cruelty.