For me, one of the easiest ways to write create a thesis statement for an argumentative paper is to pose several open ended questions that could have one of two (or more) possible answers. This book presents several controversial issues, themes, and conflicts. Using one of more of these avenues, try creating a few questions that could guide you into a thesis statement. Choose something that interests you, something you feel you could choose a side on and answer strongly, or simply something that has plenty of textual evidence to use as support.
Here are a few to get you started (pieced together from several bookclub discussion questions):
- Considering the lead female roles in the story, is it possible to be a good mother and yet a deeply flawed person?
- How much is a person's character shaped by the times and the community in which she lives?
- Is Minny justified in her distrust in white people?
- Did writing the book resolve anything in the lives of the maids? If so, what?
More questions can be found at: http://www.litlovers.com/reading-guides/13-fiction/423-the-help-stockett?start=3