- Joel Kotkin is optimistic about America's future population growth, predicting the country will have 400 million people by mid-21st century. This growth will help solve housing crisis issues and create jobs through new home construction. - Parag Khanna sees America, Europe, and China as the three leading world powers that are interconnected but also in competition. He examines rising "second world" countries and believes all nations will be in competition by mid-21st century. - The two analysts disagree on threats from other nations - Kotkin is less concerned while Khanna sees decreasing populations in countries like China as economic threats.