President Abraham Lincoln delivers one of the most famous speeches in American history at the dedication of the military cemetery at Gettysburg, Pennsylvania. Using just 272 words, Lincoln brilliantly and movingly articulated the meaning of the conflict for a war-weary public. For some time, Lincoln had been planning to make a public statement on the significance of the war and the struggle against slavery. In early November, he received an invitation to speak at the dedication of part of the Gettysburg battlefield, which was being transformed into a cemetery for the soldiers who had died in battle there from July 1 to 3, 1863. A popular myth suggests that Lincoln hastily scribbled his speech on the back of an envelope during his trip to Gettysburg, but he had actually begun crafting his words well before the trip. At the dedication, the crowd listened for two hours to Edward Everett before Lincoln approached the podium. His address lasted just two minutes, and many in the audience...