As a college student, you may be asked to begin research papers with a synthesis of the sources. Your primary purpose is to show readers that you are familiar with the field and are qualified to offer your own opinions. But your larger purpose is to show that in spite of all this wonderful research, no one has addressed the problem in the way that you intend to in your paper. This gives your synthesis a purpose and even a thesis of sorts. Because each discipline has specific rules and expectations, you should consult your professor or a guidebook for that specific discipline if you are asked to write a review of the literature and aren’t sure how to do it.
if needing more ask for help from your instructor