I haven't seen it yet, but did read the book. He's an amazing man. I understand that the movie didn't go into his childhood at all. It should have, because it made his commitment to his son even more astonishing. He was so violently and repeatedly abused by his stepfather, his mother was in prison, and to be such a good dad, having had no example! To be homeless and become a millionaire defies odds, but to be a good parent after an abusive childhood is just as unusual!