 A few too many people my age saying, oh, it's up to the next generation to solve these problems. Which, when you think about it, is both ignoble, they didn't really cause them, and impractical. Impractical, he says, because for all their energy and idealism, young people lack what he calls structural power to make the big changes needed to save the planet. So McKibben started asking, who does have that structural power?