John Klier, (13 December 1944 – 23 September 2007) was a British-American historian of Russian Jewry and a pivotal figure in academic Jewish studies and East European history in the UK and beyond. At the end of his career and life, Klier was the Sidney and Elizabeth Corob Professor of Modern Jewish History at University College London. He was a historian who challenged scholarly opinion on the Jewish community under the Tsars.
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