What careers doMichael Ritchie and Derek Estlin Purvis have in common? 
Michael Ritchie (film director): Michael Brunswick Ritchie (November 28, 1938 – April 16, 2001) was an American film director of films with comical or satirical leanings, such as "The Candidate" and "Smile". Derek Estlin Purvis: Derek Estlin Purvis (born November 27, 1972) is an American film director, producer, executive producer, screenwriter, and entrepreneur.
film director