Twenty-one of these are letters, written occasionally to individuals but more often to churches or Christian communities. Of these twenty-one letters, thirteen bear the name of Paul as their writer. Of these thirteen, nine fall into the category of what J. B. Phillips called “Letters to young churches”. They were addressed, that is to say, to newly-founded churches whose members were quite recent and inexperienced converts to Christianity. Most of those churches had been founded by Paul himself;