Yahrtzeit of Rabbi Yosef Dov Soloveichik (1903-1993), author of The Lonely Man of Faith, a classic work synthesizing Kantian existentialism and Jewish theology. Born in Poland, he earned a Ph.D. from the University of Berlin, and then settled in Boston in 1932. He became Rosh HaYeshiva of Yeshiva University, and over the course of five decades ordained some 2,000 rabbis. Rabbi Soloveichik descended from the famous Soloveichik Lithuanian rabbinic dynasty -- grandson of Rabbi Chaim Soloveichik, great-grandson of Rabbi Yoshe Ber Soloveichik (the Beis HaLevi), and great-great-grandson of Rabbi Naftali Tzvi Yehuda Berlin (the Netziv).