The idea that orthodoxy and heterodoxy are self-evident realities in any given religious tradition is not something the majority of scholars of religion accept anymore. The generally accepted understanding today is that orthodoxy is defined by relations of power. In the Islamic context, ill quote Talal Asad:
"Orthodoxy is crucial to all Islamic traditions. But the sense in which I use this term must be distinguished from the sense given it by most Orientalists and anthropologists. Anthropologists like El Zein, who wish to deny any special significance to orthodoxy, and those like Gellner, who see it as a specific set of doctrines "at the heart of Islam," both are missing something vital: that orthodoxy is not a mere body of opinion but a distinctive relationship - a relationship of power to truth. Wherever Muslims have the power to regulate, uphold, require, or adjust correct practices, and to condemn, exclude, undermine, or replace incorrect ones, there is the domain of orthodoxy. The way these powers are exercised, the conditions that make them possible (social, political, economic, etcetera), and the resistances they encounter (from Muslims and non-Muslims) are equally the concern of an anthropology of Islam, regardless of whether its direct object of research is in the city or in the countryside, in the present or in the past. Argument and conflict over the form and significance of practices are therefore a natural part of any Islamic tradition."