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Content: Terrorists often justifytheir bloody acts on the basis of perceived social, economic and political unfairness. Or they take inspiration from religious beliefs or spiritual principles. RELATED CONTENT
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Many forms of terrorism were inspired by warfare between races, struggles between the rich or poor, or battles between political outcasts and elites. Some are ethnically based separatism movements, like the Irish Republican Army or Palestine Liberation Organization. The former cartel of Medellinis considered narco-terrorists because they combine terrorist tactics with drug trafficking. Movements led by the extreme left like Colombia's FARC are an example of terrorism inspired by a socioeconomic doctrine – in this case, a belief in communism. Many terrorist groups are inspired by a specific interpretation of religious or prophetic scriptures. Al-Qaida and IS are two related groups that justify their violent action as a crusade against nonbelievers. IS wants to establish a Caliphate, or an Islamic-ruled state. How different terrorist groups act is informed by what they are trying to achieve.