Growing up as a Texas Baptist (long ago) I was predestined to know next to nothing about what some have called the great “northern kingdom” of American evangelicalism. Yes, we can debate whether “evangelical” is an accurate description of the Calvinist world based in Grand Rapids, Mich., and other cities and towns in the Midwest.

I had to learn some of this lingo when I moved to Central Illinois and then when I broke into religion-beat work in Charlotte, N.C., a city with every imaginable form of Presbyterian and Reformed church life.

As I mentioned in this week’s “Crossroads” podcast (CLICK HERE to listen), I quickly learned that the Reformed Church in America was a rather centrist flock, while the Christian Reformed Church was much more conservative, in terms of doctrine and culture. I would not have called either of these bodies a “Mainline Protestant” denomination.

Things change. Eventually, the RCA started arguing about the familiar subjects that have divided so many religious bodies — biblical authority and sex. This leads us to a Religion News Service report: “Reformed Church in America splits as conservative churches form new denomination.” Here is the overture:

(RNS) — On New Year’s Day, 43 congregations of the Reformed Church in America split from the national denomination, one of the oldest Protestant bodies in the United States, in part over theological differences regarding same-sex marriage and the ordination of LGBTQ clergy.

The departure of the theologically conservative congregations to the new group, the Alliance of Reformed Churches, leaves some who remain in the RCA concerned for the denomination’s survival. Before the split, the nearly 400-year-old denomination had fewer than 200,000 members and 1,000 churches.

At least 125 churches from various denominations are in conversation with ARC leaders about joining.

“Various denominations?” Hold that thought.