yes, the thing to do is read what others have written about him. (That is not stealing ideas from others; it's just how research works.) After you read one article about him, you will feel familiar. After reading 2, you'll have a basis for comparison. After reading 3, you'll probably decide to forget about one of them because 1 out of 3 usually is boring or confusing. After reading 4, you will have a favorite. after reading 5, you'll have a real opinion about the matter, agreeing with some writers and disagreeing with others! That is when you really have something interesting to say!!
Use those sources Sean mentioned to find articles.
Kevin, EssayForum.com