On Early Christianity and the "Church"

A Christian reader asked a good question. "Who did Paul address his letters to the Galatians , Corinthians and Thessalonians to, except the Churches in those areas? Also Romans 16:16 all the churches of Christ greet you, Paul's journeys recorder in the book of acts were for the very purpose of Setting up individual autonomous churches in each area he traveled to." My response is as follows: Paul refers to the 'church ' as the "body of Christ." The clusters of early Christians that Paul is writing to are not organized institutions as we commonly think of when thinking about modern churches. Paul, as he himself states numerous times in his letters, is working diligently to unify the "body of Christ," that is the early Christian communities he is in contact with, and get them spiritually ready for the Second Coming. It seems to me a historiographical mistake to confuse our modern concept of the church with what Paul actually meant. My Christ...