Zbigniew Brzezinski has had a hand in U.S. foreign policy for four decades. He served as national security adviser to President Jimmy Carter from 1977-1981. Since then he has counseled presidents and members of Congress. And he has written and lectured extensively on America’s role in the world. In a new book Brzezinksi argues U.S. leaders need a better strategic vision to navigate the challenges of the 21st century. He offers his insights on China’s meteoric rise, a turbulent Middle East and the likely consequences of a decline in American power.