http://www.bbc.com/news/world-us-canada-40068523"He played an essential role in all the key foreign policy events of my administration, including normalisation of relations with China, signing of the SALT II treaty [on arms control], brokering the Camp David Accords [on Middle East peace], and the Panama Canal treaties, among others," he wrote.
"He was brilliant, dedicated, and loyal, and remained a close adviser to my work at The Carter Center. I will miss him."
During the Iranian hostage crisis, Mr Brzezinski was also a leading force behind the failed US commando rescue mission, having come to believe negotiations would not work.
https://et.wikipedia.org/wiki/Zbigniew_Brzezinski