In 1963, Dr. Martin Luther King Jr. released his third book “Why We Can’t Wait,” which captures how activism by African Americans from the spring and summer of that year accelerated social change. “Why We Can’t Wait” was written at the conclusion of key national events that exposed deep racial injustice and vast economic inequality to help wake many Americans from slumber. “Human beings with all their faults and strengths constitute the mechanism of a social movement,” he wrote. “They must make mistakes and learn from them, make more mistakes, and learn anew. They must taste defeat as well...