Abstract

ArgumentJacob Lestschinsky emerged as the leading social scientist in pre-1917 circles of Yiddishist Marxist nationalists, most notably the Territorialists, who sought to create Jewish statehood outside Palestine. Lestschinsky played a central role in Jewish institutions formed in Ukraine in 1918–1920. A convinced anti-Bolshevik, he lived in Germany, then in Poland, America, and eventually in Israel. He combined two careers: a popular Yiddish journalist and an influential scholar. He conducted demographic and statistical studies under the auspices of the Yiddish Scientific Institute whose headquarters were in Vilna until the beginning of World War II and were later moved to New York. Lestschinsky was one of the fathers of YIVO and was associated with the organization until the 1950s. In January 1945, during a YIVO conference in New York, he was the first to estimate the number of Holocaust victims as six million. This article analyzes Lestschinsky's theoretical outlook and its transformation under the influence of the vicissitudes of Jewish life.