The Privileges or Immunities Clause of the Fourteenth Amendment is arguably the most historically important clause of the most significant part of the US Constitution. Designed to be a central guarantor of civil rights and civil liberties following Reconstruction, this clause could have been at the center of most of the country's constitutional controversies, not only during Reconstruction, but in the modern period as well; yet for a variety of historical reasons, including precedent-setting narrow interpretations, the Privileges or Immunities Clause has been cast aside by the Supreme...