
In that life-changing vein, there's an interesting site called Americanrhetoric.com that features hundreds of incredible writers whose speeches have shaped the world and our conception of it. The highlights (besides Baldwin of course) include Eleanor Roosevelt, Cesar Chavez, Ernest Hemingway, Ursula Le Guin, William Faulkner, Malcolm X, Martin Luther King, Jr. and many more. Some of them even have audio files where you can listen to the actual speech. Although not all of these folks are popularly recognized as "Writers," there is something inspiring about the fact that all of them were able to craft words (the same words we use!) into messages that change things.
-Abdel