Conversation so far:
Who was Nat Turner in relation to William Styron?
William Styron spent the years researching and writing his next novel, the fictitious memoirs of the historical Nathaniel Nat Turner, a slave who led a slave rebellion in 1831.
When did the controversy in The Confessions of Nat Turner begin?
During the 1960s, William Styron became an eyewitness to another time of rebellion in the United States, living and writing at the heart of that turbulent decade
What kind of rebellion was it during the 1960s, that William Styron became an eyewitness to in the United States?
William Styron was witness to the counterculture revolution with its political struggle, civil unrest, and racial tension

Question: What did he do in response to that rebellion?
Self-contained rewrite: What did William Styron do in response to that rebellion with its political struggle, civil unrest, and racial tension?