Chernenko: The Last Bolshevik: The Soviet Union on the Eve of Perestroika author Ilya Zemtsov describes Kosygin as a "Determined and intelligent, an outstanding administrator" and claims he distinguished himself from the other members of the Soviet leadership with his "extraordinary capacity for work". Historians Moshe Lewin and Gregory Elliott, the authors of The Soviet Century, describes him as a "phenomenal administrator". "His strengths", David Law writes, was "his exceptional capability as an administrator". According to Law Kosygin proved himself to be a "competent politician" also. Historians Evan Mawdsley and Stephen White claim that Brezhnev was unable to remove Kosygin because his removal would mean the loss of his last "capable administrator". In their book, The Unknown Stalin, Roy Medvedev and Zhores Medvedev called Kosygin an "outstanding organiser", and the "new Voznesensky". Historian Archie Brown, the author The Rise & Fall of Communism, believes the 1965 Soviet economic reform to have been too "modest", and claimed that Kosygin "was too much a product of the Soviet ministerial system, as it evolved under Stalin, to become a radical economic reformer". However, Brown does believe that Kosygin was "an able administrator". Gvishiani, a Russian Historian, concluded that "Kosygin survived both Stalin and Khrushchev, but did not manage to survive Brezhnev."