Muhammed Fethullah Gulen is the founder of the 'Gulen' movement (known as Hizmet in Turkey), and the inspiration for its largest organization, the Alliance for Shared Values.

Gulen teaches a moderate Hanafi version of Islam, deriving from the teachings of Sunni Muslim scholar Said Nursi. Gulen has stated that he believes in science, interfaith dialogue among the People of the Book, and multi-party democracy. He has initiated such dialogue with the Vatican and some Jewish organizations.

He is currently on Turkey's most-wanted-terrorist list and is accused of leading what Turkish President Recep Tayyip Erdogan and ruling AK Party officials call the 'Gulenist Terror Organisation'.