Isaac Klein (September 5, 1905 – January 23, 1979) was a prominent rabbi and halakhic authority within Conservative Judaism.
Personal life, education, and career
Klein was born in the small village of Várpalánka, today part of Mukachevo, in what was then Hungary. He emigrated with his family to the United States in 1921. He earned a BA from City College of New York in 1931. Although nearing ordination at the Yeshiva University's Rabbi Isaac Elchanan Theological Seminary, he transferred to the Jewish Theological Seminary of America (JTSA), where he was ordained in 1934 and received the advanced Jewish legal degree of Hattarat Hora’ah under the great talmudic scholar Rabbi Professor Louis Ginzberg. He was one of only three people, along with Boaz Cohen and Louis Finkelstein, to ever to receive this degree from JTSA. Klein subsequently earned a PhD from Harvard under the pioneering academic of Judaic studies Harry Wolfson.
He married the former Henriette Levine in 1932 and ha