On the Basis of Sex is a biopic about Supreme Court Justice Ruth Bader Ginsburg written by first-time screenwriter Daniel Stiepleman. It’s pretty rare that the subject of a biopic will give notes to the screenwriter, but this case was special. Stiepleman is actually Ginsburg’s nephew. His mother is Ginsburg’s husband Marty’s sister, so I asked him what it like having a groundbreaking Justice in the family.