A review on all security schools and mainstream theories of IR illustrate that the foundation of all are based on a philosophic understanding of human nature which then accepted as assumption of related theories. In imam khomeini school, with an alternative definition of human nature ,the cause of war at the level of anthropology attribute to the insatiable appetite and enthusiasm of two side of a binary opposition called as good and evil to dominate each other which leads to different result. regardless of accent on justice peace and condemnation of any kind of assault and will of domination, believing in a real intuitive battle between the two, accentually articulate on the Essentialism of jihad .how, why & necessities of war(jihad( in imam khomeini school are the main questions of this article.
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