All along the way, the Okies and other immigrants regularly show compassion for other people who are in need. They share what they can and do not condemn others for their unfortunate circumstances--as when a mother in the government camp is mortified that her daughters have "the skitters."
One character who shows compassion for these hard-working people who are being taken advantage of is Casey. He does not have his own family to feed, and in many ways he is nothing like the thousands of people who make their way to California hoping to make their lives better. Yet he actually loses his life trying to unite the workers so they can negotiate for better working conditions.