Thought you might be interested in this (link).
Lots of useful information about early Pauline Christianity. Among other items:
1. It was almost entirely an urban movement.
2. Jewish involvement was even more prevalent than formerly believed.
3. It enjoyed support from women, immigrants, and the middle class of the time.
4. It most certainly was universalist and cosmopolitan and did much to undermine ethnic and tribal identifications.
[The above is part of the latest comment on this blog. Read it all: here.]