In late 2005, we interviewed Justice John Paul Stevens in his chambers at the Supreme Court—the first such interview he has given. He had just completed his 30th year as an Associate Justice; only nine Justices have served longer. Justice Stevens’s chambers reflect its occupant—informal, unpretentious, and welcoming, with floor-to-ceiling bookshelves crammed to overflowing. It is quiet there, as it is everywhere in the Court, but as Holmes once remarked, it is “the quiet of a storm centeer. Two...