Shimon Gershon Rosenberg

Rabbi Shimon Gershon Rosenberg, known by the acronym הרב שג"ר HaRav Shagar, was a Torah scholar and a religious postmodern thinker. His thought was characterized by Neo-Hasidism and postmodernism. In 1996 he established Yeshivat Siach Yitzchak, in Efrat and was the head of the establishment until his death.