Provide a Literature Review
Offering a brief summary of previously published work demonstrates how well versed you are in both your academic discipline and the issue at hand. It also demonstrates how your work adds to, challenges, or offers a different perspective on questions important to others in the same field.
Here are some conventional formulas with which to introduce other authors previously published work.
Although X [insert other scholar's names] argues Y [insert their position], about Z [insert topic or issue], they have failed to consider [insert your position].
X [insert other scholar's names] has already demonstrated Y [insert their position], however, if we take their work one step further, the next logical issue is Z. [insert your position and the grounds upon which it is justified].
Although X [insert other scholar's names] argues Y [insert their position], about Z [insert topic or issue], the position does not hold up when examined from the perspective of [insert your position].
Although they appear quite brief, they can vary considerably in length, depending on your argument and the amount of research involved. For example: