One strategy in formulating a thesis statement is to include an overview of your support for the statement. This acts as a kind of outline for your reader and keeps you on track as you write, too.
If I were writing an essay on how Huckleberry Finn and The Secret Life of Bees were similar, I might have a thesis statement that looks like this:
The Adventures of Huckleberry Finn and The Secret Life of Bees have much in common, including a young person paired with an older person of the same sex, an important journey,a and a search for freedom.
Do you see how my statement is very specific, offering the reader an idea of how I plan on supporting my thesis? Your thesis, as it begins, is fine, but if you add to that statement the reasons that the statement is true, you will have a far more specific thesis, one that you can use to organize your ideas and your paper, and one that helps the reader to follow what you to say.
I hope this is helpful to you. Good luck!