On August 28, 1963, Martin Luther King, Jr. rose to the top of the steps of the Lincoln Memorial during the March on Washington for Jobs and Freedom and delivered his legendary “I Have a Dream” speech before 250,000 civil rights supporters. It would go on to reverberate through the nation, reaching millions more, and through history, inspiring generations and forever changing the course of culture. But how can sixteen minutes of human speech have the power to move millions and steer history? Here is a fascinating visual analysis of what made “I Have a Dream” so momentous and moving.