Yusuf/Cat Stevens has been inducted into both the Rock & Roll Hall of Fame and the Songwriters Hall of Fame and has sold more than 100 million albums worldwide. Every step of the way, his music has always focused on the quest for spiritual enlightenment and the search for peace. Since the 1970s he has worked directly in the field of humanitarian aid and education. It raises funds and supports victims of both natural and man-made disasters through its global foundation Peace Train, with its mission to "feed the hungry and spread peace."