I need a good thesis statement for the realationship between bodies and power struggle that is portrayed in scarlet letter and benito cereno

You have most of the thesis statement written in your question. No one else can write this for you since no one else knows exactly how you're going to focus your paper.

Here are some sites that can help with writing thesis statements:
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Once you've written your thesis, please repost and someone here will give you feedback.

=)