"There is now reason to suspect that communities, not just individual ‘spokespersons’, played an active role in the production of gospels, but Esler’s observation is right. The association evidence supports the intuitions of many gospel scholars by demonstrating that communities in antiquity wrote collaboratively as a group in a manner that fostered self-reflexivity and self-interest, and that made general readership an uninteresting and impractical goal. Early Christ-groups operated by the same conventions. This was the normal practice of composing a document from within an association, and it created an obstacle to their acceptance as authoritative texts by general audiences." (198).
This is a significant contribution to Gospels criticism that must be taken seriously. I am not persuaded by Bauckham's theory of "Gospels for all Christians" nor have I accepted his radical view that the traditions about Jesus were safeguarded by those who preserved and transmitted them. At least with regard to the former, Last has proposed a new way of thinking about the composition of Gospels that makes Bauckham's thesis untenable. At first blush, Last's attempt to forge a connection between "Christ groups" and ancient associations is successful, at least insofar as the analogy seems much closer with respect to the writing and function of group documents than is, say, genre. I am very interested in knowing how Last's theory has been received among NT scholars since its 2012 publication. The main issue, I think, will be to what extent we should read the writing practices of ancient associations into early Christian communities. That is, is there a way to prove that early "Christ groups" saw themselves as an "association" and that their group practices (such as writing) are perfectly consistent? Again, I find the analogy persuasive and helpful. In any case, there is no question: this article is a weighty one that will likely challenge quite a few followers of Bauckham, if not Bauckham himself.
Last has made his NTS article available on his academia.edu webpage here.