This week’s “Crossroads” podcast — click here to tune that in — starts with a rather obvious question linked to the coronavirus crisis.

The question: Would it be a major news story if 20% or more of America’s religious congregations were forced to shut down during the next 12-18 months?

Clearly that would be a huge development in American life — not just on the religion-news beat. On top of that, it would be a story that would almost certainly unfold in every zip code in America. There would be newsworthy hooks at the local, regional and national levels.

What kinds of stories?

Hold that thought.

The hook for this week’s discussion was my latest “On Religion” column for the Universal syndicate, which grew out of recent comments by David Kinnaman, the leader of the Barna Group — which does polling and research with a variety of churches and denominations.

Here is a key passage:

The question religious leaders are asking, of course, is how many people will return to their pews when "normal" life returns. But it may be several years before high-risk older believers decide it's safe to return, even after vaccines become available. Younger members may keep watching their own local services, switch to high-profile digital flocks elsewhere or do both.

In talks with clients, Kinnaman said he is hearing denominational leaders and clergy say they believe that, in the next year or so, some churches will simply close their doors. Early in the pandemic the percentage of insiders telling Barna researchers they were "highly confident" their churches would survive was "in the high 70s," he said.

"Now it's in the 50s. … Most churches are doing OK, for now. But there's a segment that's really struggling and taking a hit, week after week."

After reviewing several kinds of research -- including patterns in finances and attendance -- Kinnaman sent a shockwave through social-media channels with his recent prediction that one in five churches will close in the next 18 months. In "mainline" churches, he is convinced this number will be one in three, in part because these rapidly aging Protestant denominations have lost millions of members -- some up to 50% -- since the 1960s.

These mainline churches are the “Seven Sisters” of progressive Protestantism. In descending order, by size, that would be the United Methodist Church, the Evangelical Lutheran Church in America, the Presbyterian Church (U.S.A.), the Episcopal Church, the American Baptist Churches USA, the United Church of Christ and the Christian Church (Disciples of Christ).