All three American presidential candidates have pledged to restore the country’s place in world politics. But the age of unipolar American power may have passed. Scholar Parag Khanna says the world is in the midst of a profound shift, with Europe and China flexing their muscles on the global stage. But he says the real power lies among global “swing states”– smaller powers with oil, cash and other resources. He joins Kojo to discuss his provocative theory of the “Second World”.