Catholics, as a segment of U.S. population, shrank by 3.1% from 2007 to 2014, and are now outnumbered as a portion of American population by the “nones”, the religiously unaffiliated. That was the headline-grabbing revelation last week from the Pew Research Center. That trend fits within the overall decline in affiliation with Christian denominations, notwithstanding population growth in the U.S. in the same time period. So there it was in black in white: approximately 51 million adult Catholics in the United States as of 2014 versus approximately 56 million religiously “unaffiliated” adults. That should come as no surprise to any Catholic...