Henry Kissinger's 100th birthday marks a controversial legacy.

Former diplomat and presidential adviser Henry Kissinger celebrates his 100th birthday, having outlasted many of his political contemporaries. Kissinger played a key role in American foreign policy during the 1960s and 1970s, including attempts to pull the U.S. out of Vietnam. He has continued to hold sway over Washington’s power brokers as an elder statesman, providing advice to Republican and Democratic presidents. Kissinger has also coauthored a book about artificial intelligence in 2021 called “The Age of AI: And Our Human Future.” He has been accused of enacting realpolitik policies favoring American interests while assisting or emboldening repressive regimes in Pakistan, Chile and Indonesia.