Protocol: The Power of Diplomacy and How to Make it Work for you.President Obamas former United States chief of protocol looks at why etiquette and diplomacy matterand what they can do for you. History often appears to consist of big gestures and dramatic shifts. But for every peace treaty signed, someone set the stage and provided the pen. As social secretary to the Clintons for eight years, and more recently as chief of protocol under President Obama, Capricia Penavic Marshall has not just borne witness to