Finally, groups from upper-income countries are more likely to be left-wing or nationalist and less likely to have religion as their motivation. The authors conclude that policing and intelligence, rather than military force, should form the backbone of U.S. efforts against al Qa'ida. And U.S. policymakers should end the use of the phrase "war on terrorism" since there is no battlefield solution to defeating al Qa'ida."--BOOK JACKET.