chunk: Tom is moved to work for change by what he has witnessed in the various camps. He tells his family that he plans to carry on Casy's mission in the world by fighting for social reform. He leaves to seek a new world and to join the movement committed to social justice.
  Tom Joad says:
  I'll be all around in the dark. I'll be everywhere. Wherever you can look, wherever there's a fight, so hungry people can eat, I'll be there. Wherever there's a cop beatin' up a guy, I'll be there. I'll be in the way guys yell when they're mad. I'll be in the way kids laugh when they're hungry and they know supper's ready, and when the people are eatin' the stuff they raise and livin' in the houses they build, I'll be there, too.
  As the family moves on again, they discuss the fear and difficulties they have had. Ma Joad concludes the film, saying: