Who was the intended audience of Martin Luther King Jr.'s Letter from Birmingham Jail?

The intended audience of Martin Luther King Jr.'s "Letter from Birmingham Jail" primarily included white clergymen and moderate supporters of civil rights who criticized his actions in Birmingham. King aimed to address their concerns and clarify the necessity of direct action against racial injustice. Additionally, the letter served to inspire and mobilize African Americans and other activists to continue the fight for equality. Ultimately, it sought to reach a broader audience by articulating the moral imperative for justice and the urgency of the Civil Rights Movement.