Based in Iraq, Syria and Turkey, the Yezidi people claim their religion - a unique combination of Christian, Islamic, and historical faiths - to be the oldest in the world. Yezidi identity centres on their religion, Sharfadin, which has evolved into a highly complex pantheon of one God with many incarnations, the chief of whom is Melek Taus, the Peacock Angel. The Yezidi faith can be traced to a range of pre-Islamic belief systems, such as Sufism, some extreme Shi'ite sects, Gnosticism and other traditions surviving from the ancient world. This particular formulation has served to unify...