Stephon Tull was looking through dusty old boxes in his father’s attic in Chattanooga a few months ago when he stumbled onto something startling: an audio reel labeled, “Dr. King interview, Dec. 21, 1960.” The interview was made four years before the Civil Rights Act became law, three years before King’s famous “I Have a Dream” speech, and eight years before King’s assassination. The AP reports on the significance of the finding:

Many recordings of King are known to exist among hundreds of thousands of documents related to his life that have been catalogued and archived. But one historian said the newly discovered interview is unusual because there’s little audio of King discussing his activities in Africa, while two of King’s contemporaries said it’s exciting to hear a little-known recording of their friend for the first time.

In the interview, King says:

I am convinced that when the history books are written in future years, historians will have to record this movement as one of the greatest epochs of our heritage…I had the opportunity to talk with most of the major leaders of the new independent countries of Africa, and also leaders in countries that are moving toward independence,” he said. “And I think all of them agree that in the United States we must solve this problem of racial injustice if we expect to maintain our leadership in the world.

Video of the interview below: