how does the title relate the life of major characters of the story good country peole?

Answer 1

The major characters are plain, simple people. While the sisters bicker and have their differences, it is nothing that's really serious. The three women open their home to the Bible salesman and trust him. They treat him like family (or a really close friend).
In the end, the one lady (forgot her name) completely falls for the salesman's lies. Good country people are unsuspecting. The major characters are that way from the beginning to the end.

Answer 2

pursuit of happyness.