Thanks to new info uncovered by the Sony hack, we now know that at least one of Ben Affleck's ancestors owned slaves — and that the “Gone Girl” superstar requested the PBS series “Finding Your Roots” leave out that shameful portion of his family's history on his recent episode. Or, as Larry Wilmore put it on last night's “Nightly Show”: “Yep, the great liberal turns positively Nixonian when things get all slavey-slave-slave.” Don't worry, Affleck's great-great-great-great grandfather Cassius is here to explain everything.