1) The author's world view was impacted by his step-brother Bill after the death of the author's younger brother Stevie in a tragic bus accident when the author was 7 years old.
2) After Stevie's death, the author's step-mother became abusive and his father was unable to help, causing the author to believe it was better not to trust people.
3) However, Bill showed the author kindness and continued to love him despite his home situation, allowing the author to start trusting people again and changing his negative world view.