After you have selected your topic, you are ready to develop your thesis. A thesis is what you want to say about your topic. It is the proposition, claim, or main argument that you will be making in your paper. Any one topic may lend itself to many possible theses.
Please keep in mind that your thesis is a work in progress. You may not have a well-formulated thesis before you start the initial research on your topic. As you research and learn more about the topic, your initial thesis may change. This is perfectly normal. Developing your thesis may involve broadening or narrowing the scope of your topic, performing background and primary research on the topic, developing a research plan, keeping track of your research, and making use of all your resources.
Once you have committed to a final thesis, make sure it has the following characteristics:
Your thesis must say something.
Your thesis must be easily identifiable.
Your thesis must be manageable.
The University of Melbourne's Academic Skills site includes information on developing academic writing skills, including stating and developing your argument.
The Ian Malkin Centre for Legal Academic Skills Success at MLS site is a hub of useful legal academic resources. Review the legal writing section for advice on essay planning and writing.
The following books are available in the Law Library and contain useful information for developing your thesis.
Scholarly Writing for Law Students by 
Academic Legal Writing by 
Scholarly Writing by 
The Unwritten Rules of PhD Research by 