Why are savagery and violence so o mnipresent among humans? We suggest that hunting behaviour is fascinating and attractive, a des ire that makes temporary deprivation from physical needs, pain , sweat, blood and, ultimately, the willingness to kill tolerable and even appeti tive. Evolutionary development in to the " perversion" of the urge to hunt humans, that is to say the transfer of thi s hunt to members of one's own species, has been nurtured by the resultant advantage of personal and social power and dominance. While a breakdown of the inhibition towards intra-specific killing would endanger any animal species, controlled inhibition was enabled in humans in that hi gher regul atory systems, such as frontal lobe-based executi ve fun ctions, prevent the involuntary derailment of hunting behaviour. lf this control-such as in child soldi ers for example-is not learnt, then brutality towards humans re mains fascinating and appealing. B lood must ft ow in order to kill. It is hence an appetiti ve cue as is the struggling of the victim . Hunting for men, more rarely for women, is fasc inating and emotionally arousing wi th the parallel release of testos terone, serotonin and endorphins, which can produce feelings of euphoria and alleviate pain .T. Elbert (rBJ) C lin ica l Psyc ho logy & Neuropsyc hology,