Martin Luther King Jr.

Wrote the Letter from Birmingham Jail in the margins of a newspaper — a 7,000-word argument for why the slow art is the only honest one.

Eight white Alabama clergymen had published an open letter calling King's campaign "unwise and untimely" — telling him to wait. King replied from a jail cell on April 16, 1963, on whatever paper a Black trustee could smuggle in (newspaper margins, scraps, then a legal pad). The Letter from Birmingham Jail is 7,000 words long and rebuilds the moral logic of who has standing to demand justice and who has authority to call a campaign untimely. Five months later he stood at the Lincoln Memorial. Five years later he was dead at 39. The Civil Rights Act passed in 1964; the Voting Rights Act in 1965. "The arc of the moral universe is long, but it bends toward justice" — quoting Theodore Parker — was a description of the timescale he was working in. He did not live to see the bend.