
© Molecular PsychiatryA L Glenn, A Raine and R A Schug, “The neural correlates of moral decision-making in psychopathy,” Molecular Psychiatry 14: 5–6 (2009)
On rare occasions, they can be mad, bad and dangerous. More usually, they live uneventful, friendless lives on the fringes of society, unable to sustain relationships or employment. If they have children, the same cycle of separateness, coldness and brutality is repeated anew.
Psychopaths have long fascinated scientists. They seem doubly burdened - both nature (bad genes) and nurture (poor parenting) have conspired to make them social outcasts. Governments, including this one, have long sought to reduce antisocial behaviour by tackling the nurture bit and encouraging more responsible parenting. Now a study by the Institute of Psychiatry suggests that, broadly speaking, they are backing a loser.