While the traditional majority view in Judaism has been that the teachings of Kabbalah were revealed by God to Biblical figures such as Abraham and Moses and were then transmitted orally from the Biblical era until their redaction by Shimon bar Yochai, modern academic analysis of the "Zohar", including that by the 20th century religious historian Gershom Scholem, has theorized that de León was the actual author. Aryeh Kaplan posited a theory that there was an ancient core text of the "Zohar" which antedated Leon, but that several strata of text were added over time.