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Chaim Zimmerman


Rabbi Dr. Aharon Chaim Zimmerman (1914– march 9, 1995) (7th Adar II 5755) was one of the leading rabbis of the Post-War generation. He was the son of Rabbi Yaakov Moshe Zimmerman and nephew of Rabbi Baruch Ber Lebowitz.

He was born in Konotop, Ukraine, and studied under a private tutor until his bar mitzva. He was known as a child prodigy ("illui") and as a teen-ager attended the Kaminetz Yeshiva headed by his uncle the renowned Rabbi Baruch Ber Lebowitz. He left Russia at age 15 with his father and immigrated to the U.S., and taught a Talmud class at RIETS. He received rabbinical ordination from Rabbi Moshe Soloveitchik in 1939. His first published work "Binyan Halakha" contains a letter of approbation from the Chief Rabbi of Eretz Israel Rabbi Yitzchak Halevi Herzog attesting that the young author was "fully knowledgeable in the entire Talmud Bavli and Yerushalmi,Rishonim and Achronim."

He served as Rosh Yeshiva of Hebrew Theological College in Chicago until 1964, and later a Rosh Yeshiva in New York City and in Jerusalem. He immigrated to Israel in 1972. He died on march 9, 1995. (7th Adar II 5755)

He published several books on Halacha and Philosophy. He was renowned as a genius in Torah learning, and was also well versed in mathematics, physics, and philosophy. In the early 1950s when the halachic status of the 'international dateline' was the subject of considerable debate, he published his best known work 'Agan HaSahar'. He is said to have considered that precious few could understand his work, and printed a very limited edition of only several hundred copies. The book today commands a rich premium from collectors, on the rare occasions when a copy becomes available for sale. His most famous disputant was Rav Menachem Kasher, whom he attacked vigorously in 'Agan HaSahar', following Kasher's cavalier dismissal of his published opinions on the dateline controversy.

In his book Torah and Existence he cogently argues that the purpose of the world revolves around Torah . the first chapter contains an elaboration of his opinion that the founding of the modern State of Israel constituted the 'Atchalta d'Geula' (Beginning of the Redemption),though he strongly opposed much of the policies and leadership of the state.


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