The Grapes of Wrath

Rose of Sharon's pregnancy symbolizes the promise of a new beginning, but when the baby is stillborn that promise seems to have been broken.

The death of the Joads' family dog not long after they begin their westward journey foreshadows the many difficulties they will meet along the way.

I hope you can answer this.
what are som eexamples of the values in a family and community in the movie?