What is a good thesis statement for a paper on Brutus as the Tragic Hero in Julius Caesar?

You will need to think through the character of Brutus, and in
particular his motives for wanting to depose Caesar. There are many different ways of viewing his
character, but one valid approach is to explore the way that Brutus is actually tremendously
naive. He has lofty motives for deposing Caesar, but his innocence and naivety makes him easy
prey for the flattering tongue of Cassius. He is used by the plotters to gain credibility for
their less-than-noble actions yet he remains unaware of the way that he is being used. He
believes all the while that he himself is trying to do what is right for Rome, but we as the
audience cannot help seeing another more questionable agenda at work. Brutus, like Caesar before
him, is prone to the same power-hungry tendencies of anyone given such unlimited control and
might. Thus a good thesis statement might be:

Brutus is the tragic
hero of this play because of his naivety and innocence, both in regard to other people and
himself.

This would allow you to explore the differing approaches I
have outlined above and will make for an interesting essay. Good luck!