Need help with a thesis/critical sources about Edmund in King Lear

i have to write a research paper about Edmund's character in the King Lear play, however i am still debating what good thesis to write... was hoping someone can give me a few examples to think about? Also, was hoping someone could help me find critical sources that i can quote from on the internet? thankyou so much in advance!

I just answered a similar question in this thread: Afghan cultural/social values cause characters to suffer "A Thousand Splendid" thesis

Tell me three things about Edmund.
Tell me three things about the theme of the play.

That is all you need. All you have to do is choose two concepts and talk about them in relation to one another. What does it mean to talk about things in relation to one another? It is thinking about their combined significance or their relationship.

To find good articles about the play, google the title with the word "analysis"
or with the word "theme"
or with the word "article"

And google scholar is a good resource, too!