The author casually mentions, somewhere in the beginning of the book, how one of the characters' grandpa had to drive away and kill indians to take up the land on which the joads eventually had their farm. This is said almost 'in passing' as if it has no relevance and it is said by one of the characters angrily as an argument that it is in fact THEIR property. Do you feel that John Steinbeck neglects this issue?