““In 1857, Chief Justice Roger B. Taney handed down the Dred Scott decision upholding and extending slavery. Taney’s opinion was, it is generally agreed, “the worst constitutional decision of the 19th century” (the words are Robert Bork’s). Yet there is a curious and little known fact about Judge Taney. More than 30 years earlier he had freed his own slaves. Today, therefore, we would say that while he was “personally” opposed to slavery he did not want to “impose” his views on others.””