When he and other Black protesters were arrested at a whites-only lunch counter in 1961, they tried a new strategy — ‘Jail No Bail’ — and energized a movement.

The dual celebrations of a second Trump inauguration and the civil rights leader’s birth raise profound questions about Black leadership and progress toward the Rev. Dr. Martin Luther King Jr.’s dream.

The folk trio he formed with Noel Paul Stookey and Mary Travers became a pop phenomenon, scoring hits like “If I Had a Hammer” and “Puff the Magic Dragon.”