Originalism is now well established, and most of the justices on today’s Supreme Court would express some fidelity to the basic concept. Even Justice Elena Kagan, one of the Court’s more liberal members, said at her confirmation hearing that “we are all originalists” these days. But the concept’s prominence has not provided the clarity some of its early proponents had hoped it would. In fact, fully conceived, originalism does not foreclose but requires the possibility that the provisions of the Constitution are best interpreted to produce “progressive” outcomes.