July 1965, Berg was initially involved in the founding of a publishing house called "The National Institute for the Research in Kabbalah" along with Aslag's American student Levi Krakovsky, who died the following year. The institute was most likely a fundraising branch of Brandwein’s Yeshiva Kol Yehuda, as books published by the institute have Brandwein named as the senior figure, while Berg was listed as its president. Krakovsky was an emissary of Ashlag’s yeshiva "Itur Rabbanim", and had translated some of Ashlag's writings into English to support the yeshiva. He also wrote his own English introductory books to Kabbalah, and in the 1930s established his own yeshiva in the United States for the purpose of teaching Kabbalah in English. Krakovsky’s writings were also published by the new Institute. In 1970, Berg legally changed the name of the National Institute to "The Research Centre of Kabbalah", establishing it as an independent centre and publishing books of his own. His writings ranged from a basic introduction and explanation of Lurianic and Ashlagian Kabbalah to astrology and reincarnation. In 1971, Berg moved to Israel where he strengthened the centre, gave lectures and disseminated his books. In 1980, he established a yeshiva, "Or Hozer le’Limud ha-Nigleh ve ha-Nistar" (Returning Light for the Study of the Revealed and the Concealed) in Tel Aviv, which circulated various kabbalistic works. On his return to the United States in 1984 with a number of Israeli students called the Hevre (friends), Berg expanded the centre to more locations. The aim of the now independent research centre was to resolve a widespread spiritual crisis affecting Jews, where many found traditional Judaism dry and unfulfilling. Large numbers of young Jews were seeking Eastern spiritual practices, involving themselves in dangerous cults or resorting to atheism. Berg, who believed Judaism was being taught dogmatically, was determined to show inquisitive soul searching Jews that the answers could be found in Kabbalah. Controversy There is some disagreement over who succeeded Brandwein as dean of the 80-year-old Yeshiva Kol Yehuda in Jerusalem. Berg has claimed to have replaced Brandwein, his ex-uncle-in-law by his first wife, in that role; that claim is disputed by Brandwein's son Avraham, who is the current dean. The Los Angeles Task Force on Cults and Missionaries claimed he was not affiliated with the yeshiva, although a letter sent to him by Brandwein in July 1968 indicated he was President of the yeshiva.