Jihad, in its broadest sense, is classically defined as "exerting one's utmost power, efforts, endeavors, or ability in contending with an object of disapprobation." Depending on the object being a visible enemy, the devil, and aspects of one's own self, different categories of Jihad are defined. Jihad when used without any qualifier is understood in its military aspect.
Within Islamic jurisprudence, jihad is usually taken to mean military exertion against non-Muslim combatants in the defense or expansion of the Islamic state, the ultimate purpose of which is to universalize Islam. Jihad, the only form of warfare permissible in Islamic law, may be declared against apostates, rebels, highway robbers, violent groups, unIslamic leaders or states which refuse to submit to the authority of Islam. Most Muslims today interpret Jihad as only a defensive form of warfare: the external Jihad includes a struggle to make the Islamic societies conform to the Islamic norms of justice.
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