This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
The March on Washington for Jobs and Freedom drew an estimated quarter million people to the National Mall on 28 August 1963, and it is remembered today for a single address, but King was one organizer among several, not its sole architect, and the march itself was a coalition effort under strain even as it happened.
A. Philip Randolph, who had first proposed a march on Washington for Black economic demands as early as 1941, chaired the 1963 event, and the Big Six civil rights leaders, Randolph, King, Roy Wilkins, Whitney Young, James Farmer and John Lewis, organized it jointly, each representing a different organization and, at points, a different strategy for what the movement should demand and how forcefully. That coalition nature produced a genuine controversy inside the march's own planning: female civil rights leaders discovered they had been placed in a separate march procession, with no woman scheduled to speak in the main program at all. Protest from within the coalition forced a late addition, a Tribute to Women segment, where Daisy Bates spoke briefly and Rosa Parks and other women, including an absent Diane Nash, were recognized by name.
King spoke last, and what he delivered departed from his prepared text partway through: as he later described it, the singer Mahalia Jackson, standing near the podium, called out for him to tell the crowd about the dream, a theme he had used in earlier speeches, and King set his notes aside. The speech drew directly on Christian scripture and the language of the Declaration of Independence to argue that America had defaulted on a promissory note owed to its Black citizens, an argument built for the specific coalition and crowd in front of him that day, not written in isolation as a stand-alone text. It has since become the moment the march is remembered by, distinct from the march's own credited organizers, its internal fight over who would speak, and the specific promissory note argument King built the speech to make.