Craig launched the center in 1975 at the urging of Bob Maynard, then president of the Keystone ski resort. Craig wanted the center to focus on resolving conflicts in national policy issues rather than only discussing them.

FILE - In this April 10, 1974 file photo Greek singer Demis Roussos in London. Renowned Greek singer Demis Roussos, a household name in the 1970s and 1980s across Europe and beyond, has died in Athens at the age of 68, a hospital confirmed Monday Jan. 26, 2015. (AP Photo/PA, File)  UNITED KINGDOM OUT  NO SALES  NO ARCHIVE

“He had a superb voice, he traveled in the world … he loved what he was doing,” singer Nana Mouskouri told French radio RTL in a tribute. “He was an artist, a friend. I hope he is in a better world.”