 Kovel further claims that capitalism itself spurs conflict and, ultimately, war.Kovel states that the 'War on Terror', between Islamist extremists and the United States, is caused by "oil imperialism", whereby the capitalist nations require control over sources of energy, especially oil, which are necessary to continue intensive industrial growth – in the quest for control of such resources, Kovel argues that the capitalist nations, specifically the United States, have come into conflict with the predominantly Muslim nations where oil is often found.Kovel believes that state or self-regulation of markets does not solve the crisis "because to do so requires setting limits upon accumulation", which is "unacceptable" for a growth-orientated system; they believe that terrorism and revolutionary impulses cannot be tackled properly "because to do so would mean abandoning the logic of empire".