While many people this month are focused on the controversy surrounding the 40th anniversary of the Voting Rights Act of 1965, I have another civil-rights-related 40th anniversary on my mind. On Aug. 11, 1965, the Watts neighborhood of Los Angeles broke out in flames on the nation's television screens. Many cherish the memory as the moment when the militant became mainstream in a "fed-up" black America, replacing the nonviolent, gradualist efforts of old-guard civil rights leaders. The Watts riot indeed shaped modern black American history more decisively than the Voting Rights Act. The question is whether it was in a...