John Boli, Selina Gallo-Cruz, and Matthew Mathias have assembled an outstanding list of world society/world polity research.
It really is tremendous. I think of myself as generally ‘keeping up on things’, but I saw many references that were totally new to me — work I definitely want to be reading.
NOTE: This is a draft. John asks that people report on errors and omissions. Contact info is listed at the top of the bibliography.