I think that the first time I encountered the term “pew gap” was in the middle-to-late 1980s, as the side effects of the post-Roe v. Wade era began to emerge.
That was when people started talking about the impact of the Religious Right on the Republican Party and the growing secularization of the elites at the top of Democratic Party structures, where old-school labor union Catholics were being replaced by various kinds of white-collar groups linked to academia and feminism.
At the end of the 20th Century, the “pew” or “God gap” was a given. I know that I have used it before, for this piece of the “Blue Movie” essay that The Atlantic ran in 2003 remains perfect:
This brings us to another set of charts created by Ryan Burge, a political scientist who is also an ordained Baptist progressive. As I keep saying, journalists who cover religion need to follow this guy on Twitter and bookmark this website — Religion in Public.
These two charts (used with his permission, of course) are from an article entitled: “How Big is the God Gap?”
Another way to phrase that: “What would happen to American religion if these bar graphs were entirely blue or entirely red?”
Background from Burge:
So what about this question: “How many more people would be in the pews every Sunday if we attended like Republicans and how empty would they be if we are all Democrats?”
Burge explains the methods — by all means read all of his post — but ends up here:
So I will end with another question: So what do these numbers mean if you are the leader of a progressive Christian flock whose doctrinal stands align perfectly with the Democratic Party, but less than perfectly with centuries of traditional doctrines on moral and social issues?
How many people are in your pews right now and what patterns are you seeing in terms of their ages?