In this short video clip (2:36), John Ankerberg interviews Darrell Bock and Daniel Wallace. This snippet is from one of Ankerberg’s programs, titled The Battle to Dethrone Jesus. If you go to the clip you will find a link to the “johnankerberg” channel where you can find the rest of the snippets that make up the show.
One of the points mentioned in this clip is that some scholars date the letter of James in the 40’s and Galatians in the late 40’s. In somewhat of a contrast, Larry Hurtado says that there’s a consensus around 1 Thessalonians being our earliest New Testament document and that it is considered to have been written 48-51 (How on Earth Did Jesus Become a God, page 33, footnote 7).