If there's one mistake we make on days such as today, when we honor Martin Luther King Jr., it is limiting our focus to the Montgomery Bus Boycott, the "I Have a Dream" speech and the march on Selma. That "greatest hits" approach fails to account for King's evolution after those breakthrough events. It doesn't include the way he continued to raise the bar even during the short time remaining before his assassination in 1968.
A great example of later-life King is his "The Other America" speech at Stanford on April 14, 1967. It was after the passage of the Civil Rights Act of 1964 and the Voting Rights Act of 1965.