<p>Jeez, don't overthink stuff. The point of this essay is to see whether you have some academic interests and have a clue how to write about them, as well as some ability to research a simple question, and, most importantly, to get you psyched about Penn by finding professors there whose work interests you. You are trying to show that you have said interests, clue, and ability, and that you are enthusiastic about Penn. Do that any way you like.</p>