Marcus Borg has an interesting article in the Religion section of the Huffington Post today on the chronology of the New Testament. It seems to me there has been more interest in a “chronological Bible” lately, with several new Bibles appearing with the order of the books sorted by chronology rather than by traditional canon.
Borg makes several excellent points on how reading the New Testament will effect the way were understand Christian origins.

In order to make this point Borg must discount the historicity of the speeches of Acts here, which is why I said “unmediated.” Certainly we have a speech of Peter at Pentecost, but it comes through another author (Luke) at least thirty years later, probably more. Luke reported speeches accurately, in my view, but he also reported speeches which served his theological agenda. Paul remains the earliest Christian voice we have. (Borg does not mention the letter of James as an early voice since he dates the book well into the 80’s.)
Second, putting the Pauline letters first will force us to see the Gospels differently. They are “not the source of early Christianity but its product.” For Borg, the three synoptic Gospels are written after Paul’s ministry was over and Christianity had spread throughout the Empire. (This is the consensus view of the dating of the gospels.) While the content of the gospel was certainly present before the Synoptic Gospels were written, the theology present in the Matthew, Mark and Luke/Acts certainly reflects a time when Pauline Christianity was the dominant understanding of Jesus. While I am less confident about Borg’s dates for the Synoptic Gospels nor am I satisfied with separating them from the traditional authors, his point is nevertheless important.
Third, Borg points out that even within the three Synoptic gospels, placing Mark first “demonstrates that early Christian understandings of Jesus and his significance developed.” This is a standard view of the synoptic problem: Mark write first and was later supplemented by Matthew and Luke. As Borg says, they added to and “modified” Mark to reflect their theological concerns. Again, a fair point and one I can accept, although I do not think the modifications were as radical as implied by Borg.
Fourth, Borg again follows consensus and places John late in his chronology. Reading “John separated from the other Gospels and relatively late in the New Testament makes it clear how different his Gospel is.” Borg correctly points out that the gospel is rich with “metaphorical and symbolic language” which functions as a “witness” of the theology of John’s community. I think that this is also quite acceptable, although I would also include the letters of John and Revelation at this point as well.

I find it fascinating that Borg considers the trajectory from the earliest to the latest books as a trajectory of accommodation with culture: “[The books] reflect a trajectory that moves from the radicalism of Jesus and Paul to increasing accommodation with the cultural conventions of the time.” In Galatians the issues is the proper way to obey God, should Gentiles keep the Law or not? By Revelation, people are not even thinking about keeping the Jewish Law and wondering if it is permissible to participate in pagan festivals or “sin that grace my abound.”
This continues well into the early centuries of the church, and is repeated every time there is a call back to the original sources (the Reformation, the Great Awakening, etc.) Reading the books chronologically highlights the theological trajectory of the New Testament documents, but also highlights the struggles the church of all ages faces.