Henry Kissinger was a complicated, insecure man who believed the US alone could impose order in a complicated, insecure world. For almost a decade from 1969, at the height of cold war instability, he became the international face of America – a very political diplomat almost as well known as his patron, Richard Nixon, the then president. Kissinger was also a Harvard academic and self-styled grand strategist, a student of Castlereagh and Metternich who put his amoral theories of “realist” foreign policy into practice with often horrific results. He viewed peoples and nations as movable, disposable pieces on a giant...