Mainstream Protestant churches no longer have the social power they once did; they probably never will again. Yet, there are those who still operate as if we did and it seems a rather sad chimera. That's one of sins of old age, I guess.
This places the UCC in proper international context:
Third and finally, the UCC is small and getting smaller, presently accounting for four-tenths of one percent of the adult U.S. population. Between 2000 and 2010, the UCC lost over 300,000 members, an astronomical loss for a group that, in fall 2014, put its membership at less than a million. Of those who remain, 67% are 50 or over.