I'm fine with all datings for the DSS. I went over them above with respect to the writings that mention the Teacher, and they all date by paleography and carbon dating to the Herodian era, and two of them (4Q266 and the Psalms Pesher) are carbon dated up to 80 CE. The Habakkuk Pesher is the only one that has any carbon dating issues with respect to the idea that the Teacher was James (or anyone else who lived after 2 CE, plus or minus however many years). And as I said above, as noted in
The Dead Sea Scrolls in Context (2 Vols): Integrating the Dead Sea Scrolls in the Study of Ancient Texts, Languages, and Cultures (2011), edited by Lange, Tov and Weigold:
The lower calibrated radiocarbon ages of the Community Rule (1QS) and Pesher Habakkuk (1QpHab) around the turn of the millennium and the Common Era, however, could even indicate a date towards the end of the Qumran settlement and the First Jewish Revolt (66-73 CE).
https://books.google.com/books?id=xM7En ... ng&f=false
What I think you aren't appreciating is that it doesn't matter to me if the Teacher was James or anyone in particular; it is that the Teacher seems
similar to James, that the "doctrines, ideas, and orientations" in the DSS seem
similar to those of the Fourth Philosophy (in which I include Jewish Christianity). While some DSS do date to before the first century CE, the majority of them are from the Herodian era, as you can see in VanderKam and Flint's
The Meaning of the Dead Sea Scrolls.
Archaic (250-150 BCE) 21 manuscripts
Archaic to Hasmonean (200-150) 20 manuscripts
Hasmonean (150-ca. 50) 224 manuscripts
Transition to Herodian (ca 75-1 BCE) 5 manuscripts
Herodian (50 or 30 BCE-68 CE) 418 manuscripts
https://books.google.com/books?id=SBMXn ... ts&f=false
The "doctrines, ideas, and orientations" of these older texts (as Eisenman puts it) "can then be shown to have flowed full-blown and almost without alteration into the main 'opposition' orientation of the first century CE. Thus the argument of this book remains unaffected. Only the direct textual link to James or some other first century 'Righteous One' or 'Zaddik' would be broken..."
For me this "opposition orientation of the first century CE" that inherited these older texts is the Fourth Philosophy, and since all the texts that mention the Teacher are dateable to the Herodian era and it is the era I think best fits what these texts say, I'm inclined to think that the Teacher was a Fourth Philosopher. And since I see Christianity as being a faction of the Fourth Philosophy, this would be a way of explaining all the similarities that exist between the DSS and Christianity, whether James was the Teacher or not.