Zbigniew BrzezinskiAs National Security Adviser to President Jimmy Carter, Zbigniew Brzezinski (19282017) guided U. S. foreign policy at a critical juncture of the Cold War. But his impact on America's role in the world extends far beyond his years in the White House, and reverberates to this day. His geopolitical vision, scholarly writings, frequent media appearances, and policy advice to decades of presidents from Lyndon Johnson to Barack Obama made him America's