More information on why your friends and loved ones can treat you so horribly, at the request of an authority figure -- Watchtower.
Decades after a notorious experiment, scientists have found test subjects are still willing to inflict pain on others - if told to by an authority figure.
US researchers repeated the famous "Milgram test", with volunteers told to deliver electrical shocks to another volunteer - played by an actor.
Even after faked screams of pain, 70% were prepared to increase the voltage, the American Psychology study found.
Both may help explain why apparently ordinary people can commit atrocities.