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Jonathan Russell is head of policy for the anti-radicalization think tank Quilliam. The views expressed in this commentary are solely those of the writer.
London (CNN)Governments cannot defeat extremism by themselves. They may be able to degrade and destroy ISIS jihadists on the battlefield with their targeted air strikes, but if they're going to win this generational struggle against ideological fanatics then they are going to have to triumph in the battle of ideas and win the war of words. And that is not going to happen on Capitol Hill or in Downing Street.