ikhwan-al-safa and khollan-al-wafa are islamic philosophers with scientific,religious and goals and viewpoints. their epistemology is based on greekphilosophy and islamic principles. according to their opinions, religion was facingcorruption and despotism. so, the only way to reform was the greek philosophy. inpolitical aspect, considering decline, corruption and decentralization in abbasid’sst...