6. The Letter from Birmingham Jail by Martin Luther King Jr.
In 1963, Martin Luther King Jr. penned his Letter from Birmingham Jail on scraps of paper, passionately defending nonviolent protest. King’s eloquent response to critics stands apart from other open letters of the civil rights era, blending moral philosophy, personal conviction, and a call to justice. His words—crafted under confinement—became a manifesto for equality, inspiring generations of activists. The letter is now a cornerstone document in the struggle for civil rights.
