Becoming Diaspora Jews: Behind the Story of Elephantine by Karel van der Toorn is journey to the ever-fascinating Jewish community of Elephantine Island, on the Upper Nile. The community of soldiers (mercenaries) and their families lived on the island for a span of 100 years, during the 5th to 4th centuries BCE. They left behind papyri and ostraca, most of which were excavated in the early twentieth century. Studying this group of Jews is essential for any investigation of First Temple Judaism.
One of the most interesting things about the community is their multiple identities; they self label themselves both Arameans and Jews in documents. They seem to have a dual ethnic identity. Van Der Toorn explores this dynamic, and its possible origins, in detail.
What is really important to understand about the Elephantine Jews is their unapologetic polytheism. They worshiped the Jewish deity, but other deities as well. Their practice was not monotheism, but monolatry – the belief in one chief god and other deities. The Elephantine Jews were in communication with official in the Holy Land. They never try to hide or apologize their situation. I suggest that at this time, this was the situation with Judaism everywhere. Strict monotheism, and even the Torah, would come later. This book is an excellent window on a world hinted at in the Tanakh, but never fully realized.