Or the simpler primer:
PCUSA - generally apostate to heritical as an organization, but with some Christians still in membership for better or worse reasons.
Cumberland - liberal groups that don’t hold to Reformed beliefs.
EPC - fairly solid underpinings, but a weak structure which is tolerant to a fault. Will probably split in the next few years. Tends to have larger congregations.
PCA - more conservative than the EPC, but with a strong ‘moderate’ contingent who favor growth to the extent that they are willing to compromise with the culture. Also appears to be heading for a split.
OPC - smaller, more unified. Perhaps the most solid of the bodies.
ARP - since abandoning exclusive psalmology a few years ago, not much to set it apart. May be closest to the EPC (local option on deaconesses, for example) but with a stronger, more unified structure.
Assorted small bodies, each claiming to be purer than the next.
Frankly, except for the PCUSA and the Cumberlands, the rest need to get together in a big room, and restructure across the board.
Thanks. Sounds like a mess. Who determines which group is apostate or heritical?