Rabbi Yaakov Yisrael Kanievsky (1899 – August 10, 1985), widely revered as The Steipler or The Steipler Gaon, was a preeminent Haredi rabbi, Talmudic scholar, and posek (decider of Jewish law). He was globally recognized as one of the ultimate spiritual authorities (Gadol HaDor) of his generation.

Early Life and Conscription

Born in Hornostaypil, Ukraine, to Rabbi Chaim Peretz (a Chernobyl Chassid and local ritual slaughterer) and his wife Bracha, his father passed away when Yaakov Yisrael was only seven. At around age 11, he went to study at the famed Novardok Yeshiva under Rabbi Yosef Yoizel Horowitz. He progressed so rapidly that by age 19, he was sent to establish a yeshiva branch in Rogochov.

His studies were interrupted when he was conscripted into the Soviet Red Army during the Bolshevik Revolution. Despite exceptionally harsh conditions, he steadfastly maintained his religious observance:

• The Sabbath Defiance: He was court-martialed for refusing to violate the Sabbath. His punishment was to walk between two rows of soldiers who beat him with rifle butts. He later recalled that the pure spiritual satisfaction he felt standing up for his convictions was a high point he never again equaled.

• Hearing Loss: On a brutally cold night on guard duty in Siberia, he refused to wear his uniform hood out of fear that it might contain shatnez (a biblically forbidden mixture of wool and linen). While he survived the night, the extreme cold permanently damaged his hearing, causing him to be profoundly deaf for the last 35 years of his life.

Marriage and Move to Israel

After his discharge from the army, he moved to Białystok, Poland, to continue studying Torah without Communist interference.

In 1925, he published his first major work, Sha'arei Tevunah ("Gates of Understanding"). This book reached the renowned Torah giant Rabbi Avraham Yeshayahu Karelitz (the Chazon Ish) in Vilna. Impressed purely by the caliber of the writing, the Chazon Ish decided that the author was a fitting match for his sister, Pesha Miriam Karelitz. The two married, and Rabbi Kanievsky was subsequently appointed Rosh Yeshiva (dean) of the Novardok yeshiva in Pinsk.

In 1934, at the urging of the Chazon Ish, Rabbi Kanievsky and his family moved to Mandate Palestine, settling in Bnei Brak. He was appointed Rosh Yeshiva of Yeshivas Beis Yosef - Novardok in Bnei Brak and spent the rest of his life there.

Legacy and Major Works

Though he shunned publicity and lived an incredibly modest, simple life, tens of thousands of people from all over the world sought him out for guidance, blessings, and psychological or personal advice.

His written works include:

• Kehilos Yaakov ("Assembly of Jacob"): A monumental 19-volume commentary containing unique, deep analytical breakdowns of most of the tractates and concepts in the Talmud.

• Birkas Peretz: A commentary on the Torah.

• Chayei Olam: A work on spiritual and ethical growth.

• Karyana D'Igarta: Multi-volume collections of his personal correspondence and letters.

When he passed away on a Friday night in August 1985, an estimated 150,000 mourners attended his funeral in Bnei Brak. His legacy was carried on by his son, the late Rabbi Chaim Kanievsky, who also became one of the most prominent rabbinic leaders in the Jewish world.