What is a good thesis statement about The Strange Case of Dr. Jekyll and Mr. Hyde?

That depends on the assignment.  

Have you been given an assignment that involves a specific question about the book, or that points you in the direction of certain themes? Since you don't mention anything like that in your question, I'm going to assume you haven't been given any such thing, and have just been asked to write an essay or a paper about Dr. Jekyll and Mr. Hyde, with the topic left wide...

That depends on the assignment.  

Have you been given an assignment that involves a specific question about the book, or that points you in the direction of certain themes? Since you don't mention anything like that in your question, I'm going to assume you haven't been given any such thing, and have just been asked to write an essay or a paper about Dr. Jekyll and Mr. Hyde, with the topic left wide open. 

A thesis statement should be brief and clear, and it should make a claim about the book that it will take you the rest of the essay to prove.

Here are a few suggestions of possible thesis statements to get you started:

• "The process of disintegration that Dr. Jekyll goes through over the course of the novel resembles the process of drug addiction."


• "Although Utterson is a good person and a very good friend to Dr. Jekyll, he is unable to save Dr. Jekyll from himself."


• "The novel would have a very different effect on readers who do not know from the start that Dr. Jekyll and Mr. Hyde are the same person."


• "The author's many chilling descriptions of Hyde help us feel the horror of a person who is entirely without conscience."


• "Throughout the novel, Dr. Jekyll has experiences and feelings that all people can identify with."