“The arc of the moral universe is long, but it bends toward justice.” On March 25, 1965, at the conclusion of a march from Montgomery to Selma, Martin Luther King Jr. stood on the steps of the Alabama state capitol and delivered a speech called ‘Our God is Marching On!" The full speech is difficult to secure online. Here it appears in five parts of five minutes each. Here also are the concluding two minutes, which have given the speech the name by which it is most famously known today, “How Long, Not Long."