The Brisker Rav, or Rabbi Yitzchok Zev Soloveitchik, was a prominent Jewish scholar and leader in the 20th century. He was born in 1886 in Brisk, a city in present-day Belarus, and became known for his deep analytical approach to Talmudic study. His teachings emphasized rigorous logic and critical thinking, influencing many students and scholars. He served as the rabbi of Brisk and later moved to Jerusalem after World War II, where he continued to teach and lead. The Brisker Rav's legacy includes a significant impact on Yeshiva education and the development of the Brisker method of learning, which remains influential today.