3 ms·You seem to be mistaking an answer to "what" as an answer to "why/how"by awakeasleep 8y agoYou seem to be mistaking an answer to "what" as an answer to "why/how"dnbgfher 8y agoThe answer to "what" is implied above. Evolution.ivanhoe 8y agoor a military selection of psychos... because ability to limit or completely switch off the empathy is one of the characteristics of psychopathic criminals