Henry Kissinger, an influential and controversial U.S. diplomat during the Cold War era, has died at the age of 100. He was known for his role in Washington’s efforts to normalize relations with China, negotiate arms control agreements with the Soviet Union, and bring an end to the Vietnam War.

He passed away at his home in Connecticut on Wednesday, according to his geopolitical consulting firm, Kissinger Associates. Originally from Germany, Kissinger made significant contributions to U.S. foreign policy during the 1970s. He served as national security adviser and secretary of state under President Richard Nixon. Kissinger continued in a similar role under President Gerald Ford after Nixon’s resignation in 1974.

Kissinger’s ability to forge diplomatic ties and engage in active foreign policy was a subject to both praise and criticism. While he was credited with various landmark achievements, there were strong condemnations over his support for anti-communist dictatorships, particularly in Latin America.

Several world leaders have paid tribute to Kissinger’s legacy, acknowledging his historic contributions to global diplomacy. But, others have criticized his actions, such as his involvement in the 1971 conflict between East Pakistan and West Pakistan.

Born in Fuerth, Germany in 1923, Kissinger and his family moved to the U.S. in 1938 to escape the rise of Nazi persecution against European Jews. He naturalized as a U.S. citizen in 1943 and later served in the Army during World War II before pursuing an academic career.

Kissinger embarked on diplomatic initiatives with the U.S. governments starting in the late 1960s, and he is remembered for playing a role in U.S. foreign policy during the Vietnam War and seeking improved relations with China and the Soviet Union.

He was awarded the Nobel Peace Prize in 1973 for his part in bringing an end to the U.S. involvement in the Vietnam War. However, his actions drew widespread criticism, sparking widespread debates and discussions about his influence in history. After his career in government, he established a consulting firm and continued to offer opinions on international affairs.

Kissinger’s influence spans beyond his control of U.S. foreign policy, later establishing himself as a public commentator and influential global figure. Nevertheless, his impactful diplomatic actions continue to be the subject of public debate.