Wow, pretty broad topic. Defining the subject of sociology? Just follow the principles used for any other essay. Draft thesis statement, in this case, it won t be a strong line of argument as you are writing an essay that defines a topic. You will need to brainstorm sub-topics. Pick some and then write your body paragraphs. Write your conclusion. Then come back and finalize your thesis statement. AND THEN, finally, you will write your introduction. Sounds strange, but it works like a charm and no "introduction writer s block" which plagues everyone! Go to my website and get the links in red on the first page of links (there are two of them). I put all of the links I had collected from answering these essay questions onto a website, so students could get what they need. It is small and has no ads, so easy to navigate: http://users.wowway.com/~amerimama/index.html First page of links, get the first two links in red, one for the essay and one for the thesis statement. You will do fine!