Philip Lader — the former U.S. ambassador to the Court of St. James’s and chairman of WPP plc (including J. Walter Thompson, Ogilvy & Mather, Young & Rubicam, Grey Global, Burson-Marsteller, Kantar, and Hill & Knowlton, with 205,000 people in 3,000+ offices in 114 countries) — is a senior adviser to Morgan Stanley, lead director of AMC Entertainment, and a trustee of RAND Corporation and several foundations.