Rabbi Shimon Gershon Rosenberg (1949-2007), known as Rav Shagar, was a religious Zionist thinker and the founding rosh yeshiva of Yeshivat Siach Yitzchak in Efrat. He studied at Kerem B'Yavneh and Yeshivat HaKotel.
Bio from Koren Publishers
Festival Discourses for the Present Age
