In April 1967, at New York City’s Riverside Church, Dr. King delivered a sermon that offered a profound diagnosis of the illnesses afflicting the nation. King summoned the nation to “undergo a radical revolution of values” that would transform the United States “from a thing-oriented society to a person-oriented society.” Only through such a revolution, he declared, would we be able to overcome “the giant triplets of racism, extreme materialism, and militarism.”