Origins of Judaism
For centuries, the traditional understanding has been that Judaism came before Christianity and that Christianity separated from Judaism some time after the destruction of the Second Temple in 70 CE. Starting in the latter half of the 20th century, some scholars have begun to argue that the historical picture is quite a bit more complicated than that. In the 1st century, many Jewish sects existed in competition with each other, see Second Temple Judaism. The sects which eventually became Rabbinic Judaism and Early Christianity were but two of these. Some scholars have begun to propose a model which envisions a twin birth of Christianity and Judaism rather than a separation of the former from the latter. For example, Robert Goldenberg (2002) asserts that it is increasingly accepted among scholars that "at the end of the 1st century CE there were not yet two separate religions called "Judaism" and "Christianity"".
Daniel Boyarin (2002) proposes a revised understanding of the interactions between nascent Christianity and nascent Rabbinical Judaism in Late Antiquity which views the two religions as intensely and complexly intertwined throughout this period.
Panarion
The first section of the first of the three books contains an account of 20 heretical sects before the time of Jesus; the remaining portion is occupied with the description of 60 sects of Christianity. However, the total number of sects is actually 77, because three of the first 20 are general names: Hellenism, Samaritanism, and Judaism. In the editions of the "Panarion", each heresy is numbered in order; hence it is customary to quote the "Panarion" as follows: Epiphanius, "Haer." N [the number of the heresy].