Whole books have been written about the impact of slavery and surrounding events.
We'll be glad to critique your answer.
What events in the history of slavery in America have had a notable impact on the current state of U.S. society and cultural relations?
2 answers
Whole books -- that's right! And umpteen websites and articles, etc.
http://books.google.com/books?q=timeline%20us%20history%20slavery&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&sa=N&hl=en&tab=wp
http://www.google.com/search?q=timeline+us+history+slavery&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
http://books.google.com/books?q=timeline%20us%20history%20slavery&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&sa=N&hl=en&tab=wp
http://www.google.com/search?q=timeline+us+history+slavery&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a