“Americans don’t learn about the world, they don’t study world history, other than American history in a very one-sided fashion, and they don’t study geography,” Brzezinski says. “In that context of widespread ignorance, the ongoing and deliberately fanned fear about the outside world, which is connected with this grandiose war on jihadi terrorism, makes the American public extremely susceptible to extremist appeals.” But surely most Americans are tired of overseas adventures, I say. “There is more scepticism,” Brzezinski concedes. “But the susceptibility to demagoguery is still there.”