Stanley is a sadist who enjoys causing people pain. He likes punching people at random on the street, spraying people with pepper spray and recently pushing people in the subway and watching them scream for help. He reports he has no greater sense of fulfillment than being an agent of pain, spreading fear and chaos in the world, which he connects with his twisted vision of survival of the fitest.
Given that Stanley is quite good at causing others unnecessary pain, does he have a meaningful or good life?