This article is on Anatolian Alevism, according to the views of Fuat Koprulu. Having been one of the first to study this subject matter in the early years of the republic of Turkey, Koprulu provides very insightful and objective insights. Turkish history and Turkish beliefs before and after Islam are discussed. Central figures such as Ahmad Yasawi and Yasawiyya are also discussed. The history of the various sects are discussed. They are the history of religious synretism in Asia minor; the migration of the Turks from Central Asia to Asia Minor that lasted 4 centuries; the formation of Sufism in Asia Minor; Heterodox sects such as Haydariyya, Kalendariyya and Babaîs; and such heretical actions; the bektashi order's formation, as well as the Hadji Bektash Wali. Finally, I made my explainations and critics about Koprulu's views and then pointed out to my evalations on this matter.