"I think that fear is by far the biggest risk factor on the planet," Jeffrey says. "The idea that 'I don't want to cooperate with that country. They're out to get us.' And this idea that it's us versus them and that we are without any means of solving it."
"We're just in direct conflict with some other part of the world, whether it's religious divide or ethnic divide or geographical divide or the divide of rich and poor," he says. "It's the fear that conflict is inevitable. That's actually the biggest risk we face, because violence and conflict with others can be a self-fulfilling prophecy. If you believe it's going to happen, they'll believe it's going to happen, everybody gets absolutely into hostilities and, sure enough, what everybody feared does happen."