"I Have a Dream" speech is synonymous with Dr. Martian Luther King Jr's legacy. It wasn't his first speech at the Lincoln Memorial but it's the speech history likes to repeat the most. The part they don't like to talk about is he regretted the speech.
It happened after he witnessed what was happening in Vietnam. He even called some of the optimism of the speech superficial.
It was't that he no longer thought equality was important. He knew the dreamy-eyed idea of such wasn't realistic seeing the nature of what was happening with the Vietnam war. He knew there needed to be a different approach.
Just three months later he would be assassinated
A Time article uncovers more watered down King facts that may make your head spin but may do you some good. Here's the link 10 Historians on What People Still Don't Know About Martin Luther King Jr.