Martin Luther King's "Letter from a Birmingham Jail"

Rhetorical Consideration: While this is technically a "letter," consider it's effectiveness as an argument essay. Consider the ethos (credibility), logos (logic), and pathos (emotion) appeals that are all fully active in this engaging work! Or, consider the academic scope of disciplines covered, as this letter reads like a research paper--and a well-researched paper at that! Or consider the amazing thing about the latter quality, which is that King wrote entirely from what he knew; his Birmingham jail cell offred no library in which to conduct research, nor a smart phone to do instant google searches! Note all of the specific references King makes in the letter to significant people, places, philosophies, and events (spanning a number of academic disciplines)--again, all from the top of his head.