More often than not the men and women of the Supreme Court seem to figure out what decision is best at the time. But there have been some doozies in the past that should make us reluctant to assume that will always be the case. We have not fully overcome the thinking behind the now infamous 19th century ruling that said that blacks had no rights that whites needed to respect. Chief Justice Roger Taney, a Marylander, wrote that opinion. Efforts to remove statues of him — in Baltimore, in Frederick, in Annapolis — won't do much to address that lingering strand of thought.