View image | gettyimages.com From The Wall Street Journal: Amy Boyle grew up in the Roman Catholic Church, singing in choir and serving as an altar girl. But Ms. Boyle, now a 35-year-old L.A. resident and mother of twin baby boys, left the faith as a young adult—joining the ranks of Americans who don’t identify with any religion, many of them former Christians. The group is growing so rapidly, it now makes up a greater share of the U.S. population than... Read more