<Ul> <Li> Diplomat </Li> <Li> Political scientist </Li> <Li> Writer </Li> </Ul> <P> George Frost Kennan (February 16, 1904--March 17, 2005) was an American diplomat and historian . He was known best as an advocate of a policy of containment of Soviet expansion during the Cold War on which he later reversed himself . He lectured widely and wrote scholarly histories of the relations between USSR and the United States . He was also one of the group of foreign policy elders known as "The Wise Men". </P> <P> During the late 1940s, his writings inspired the Truman Doctrine and the U.S. foreign policy of "containing" the Soviet Union . His "Long Telegram" from Moscow during 1946 and the subsequent 1947 article "The Sources of Soviet Conduct" argued that the Soviet regime was inherently expansionist and that its influence had to be "contained" in areas of vital strategic importance to the United States . These texts provided justification for the Truman administration's new anti-Soviet policy . Kennan played a major role in the development of definitive Cold War programs and institutions, notably the Marshall Plan . </P> <P> Soon after his concepts had become U.S. policy, Kennan began to criticize the foreign policies that he had seemingly helped begin . Subsequently, prior to the end of 1948, Kennan became confident that positive dialogue could commence with the Soviet government . His proposals were discounted by the Truman administration and Kennan's influence was marginalized, particularly after Dean Acheson was appointed Secretary of State in 1949 . Soon thereafter, U.S. Cold War strategy assumed a more assertive and militaristic quality, causing Kennan to lament about what he believed was an abrogation of his previous assessments . </P>

Who was the person who sent the long telegram from moscow in 1946
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