Hi, I need to write a deep analysis of "The Lottery" by Shirley Jackson, but I need help finding a good thesis statement.

In her short story "The Lottery," Shirley Jackson plays on the fact that people are sometimes so far removed from their own ancient customs that they are shocked by their violence. In fact, she is not mistaken; people were so shocked at her story that it was banned in a number of places and was seen as a “horror” story by many. Yet, nothing is as simple as all of that because, in the story, the author is simply using a practice that has been around for centuries. Additionally, the story is set in a seemingly modernized society to illustrate the ways in which people behave. In "The Lottery," Jackson uses an ambiguous setting, timeless language, and ancient customs in order to evoke eternal truths about human nature.  
Choosing a scapegoat to sacrifice for the good of the people, be it a literal sacrifice or symbolic sacrifice, has always been the way of humanity. However, we rarely think about this phenomenon in our modern Western world. In the story, Jackson uses a brilliant method of getting our attention to force us to come face to face with the horror and unavoidable truth of human sacrifice: she takes what we all believe to be an ancient, long-dead practice (stoning) and sets it in an ambiguous modern town. It could be a town that any one of us lives in.  
For example, in the opening paragraph of the story, Jackson writes, “The people of the village began to gather in the square, between the post office and the bank, around ten o'clock. . . in this village, where there were only about three hundred people, the whole lottery took less than two hours.” She makes the whole thing seem so normal; it could be any village, from any time period. This is done so that people become aware that, no matter what, they are still capable of committing the same age-old atrocities, regardless of the setting.
Another tactic that the author uses to evoke certain truths about humanity is to use language that gives a sense of the past, with which we are all familiar. This gives the reader a sense of comfort, of familiarity, and of safety.  Everyone seems jovial, cheerful, and happy, or they are simply experiencing normal, everyday emotions. For instance, people refer to one another as “folks.” The way that Jackson writes about the lottery, makes it seem like the village is getting ready for a summer picnic.  She says things like “There was a great deal of fussing to be done before Mr. Summers declared the lottery open,” once more luring the reader into a false sense of security.
Finally, she drops the bomb on us.  The “lottery” is not a game in which someone from the village wins a coveted prize, but rather an annual custom in which someone’s life is literally sacrificed. She ulitizes the ancient practice of stoning, something that is still around today in some parts of the world. There are rules to make it fair, of course, and age is considered.  There are rituals, and there is the usual mundane chitchat going on before, during, and after.  In fact, Jackson writes that “The people had done it so many times that they only half listened to the directions: most of them were quiet.”
The reader is not shocked because they were not aware this type of thing went on, they are shocked because of the possibility that we are still capable of such a thing.  In short, they are shocked because Jackson makes it seem like a real possibility.  It shows us just how little importance we have placed and continue to place on human life. It is more than just a sad story; it is a reality for many people, even in our modern world.