Preaching a message of nonviolent resistance, the Rev. Martin Luther King Jr. was the leading voice ... here’s a look back at his defining years in pictures.

That clip is obviously going viral, so let's look at actual pictures of the Jan. 6 crowd vs. Martin Luther King Jr.'s March on Washington crowd: ...

The Rev. Martin Luther King Jr. turned a wisp of a smile to his companion ... his calm preaching of nonviolence. King became world-famous (TIME cover, Feb. 18, 1957), and in less than a year ...

We shall overcome because the arc of the moral universe is long but it bends toward justice. –Dr. Martin Luther King Jr., “Remaining Awake Through a Great Revolution.” Speech given at the National ...