The monograph Assassins versus Muslim Brothers is a specific study of philosophy, dogmatic concepts and practical methods of violence in the Ummah, i.e., the society of believers. It lays out the idea that the struggle for power in the Islamic State began as early as during the lifetime of the prophet Muhammad, with the legal contradictions between the centre of power and the periphery hiding the antagonism between the different ethnicities and the explicit collision between different statecraft traditions. It appears as of the epicentre of violence occurs to the East of the large Arab capitals: Medina, Damascus and Baghdad. That was where the defeated Persian-Sasanian establishment would not accept the Arab domination and started to generate the emerging different sects, shaping quasi-etatist formations. There is a curious presumption that violence in an Islamic State emerged among the discontented Persians, who had even adopted the Islam and became followers of the Fourth Righteous Caliph Ali ben Abi Talib and kept parts of their polytheist beliefs (mainly) Zoroastrianism. While Islam did not erase the Sasanian paganism, it simply found a specific regional and psychological form of cohabitation with it.