Found this the other day.
Looks relatively good tonight, clearing tomorrow. I might put this on the Astronomy search page.
Kennan – person – American diplomat and historian who recommended the policy of containment toward Soviet aggression. He served as U.S. ambassador to the USSR (1952) and Yugoslavia (1961-1963). His written works include American Diplomacy, 1900-1950 (1951).
Sounds like someone whose theory worked adequately well against the enemy of his time, but the theory is out of place in today’s world.