The media have paid a lot of attention to the rise of the religiously unaffiliated in recent years, and for good reason. In 1990, just 1 in 20 adult Americans were not connected to a religious faith. Today, it’s closer to 1 in 4. The ripples of such a shift are still being sorted out by observers of American religion.
One of the most visible effects is that the pews are much emptier today than they were just 30 years ago. What does that decline look like, in the simplest terms?