"The book of Acts without chapter 15 would be like a wedding ceremony without the crucial pronouncement. Everything that happens in chapters 1–14 leads up to this high point and what follows merely traces the implications of the decision. It was not uncommon in the ancient world for a piece of literature to have not only a beginning and an ending, but also a centre."
Brian S. Rosner, "The Progress of the Word," in Witness to the Gospel: The Theology of Acts, ed. I. Howard Marshall and D. Peterson (Grand Rapids: Eerdmans, 1998), 227.