None of them really.
http://www.huffingtonpost.com/matthew-pearl/top-five-myths-about-edga_b_334742.html
Which of the following noted American authors wrote works that supported slavery?
a. Ralph Waldo Emerson
b. Henry David Thoreau.
c. Edgar Allan Poe
d. Harriet Beecher Stowe
2 answers
The answer would be D) Harriet Beecher Stowe. He wrote Uncle Tom's Cabin in 1852 before the American Civil War.