Source: Terry Mattingly’s On Religion If the goal is to map the evolving landscape of American religion, the late George Gallup, Jr., once told me, it was crucial to keep asking two kinds of questions. The kind attempted to document things that never seemed to change or that were changing very, very slowly. Thus, Gallup urged his team to keep using old questions his father and others in the family business began asking in the 1940s and ’50s, such as how often people attended worship services, how often they prayed and whether they believed in God. The second kind of…