I need a good thesis idea/statement for Protestantism.?

I have a research paper topic due for my religion class tomorrow and I need help with an idea for a thesis statement. We could chose any important individual or group in regards to Christianity and I think I want to focus on protestantism vs Christianity explaining the differences. It needs to be a lengthy paper up to 8 pages so it would be great if you could help me out with an idea to get started.

You might want to reconsider your premise as Protestantism is a form of Christianity and therefor there can be no difference between them. It's like saying a blue egg vs eggs.

I would look at Martin Luther and his Theses. This will give you a clear understanding of why Luther was fighting against the form of Catholicism at the time.
Note: Luther didn't want to break away from Catholicism but merely reform it.

The thesis should be Protestantism Vs. Catholicism and the reason for the reform of the church. Why the protestants felt they needed to break away from the catholic church etc. And if you feel like it you can throw the Church of England in there as well which was devised by Henry the VIII. It was all a great separation and segregation of church.