From February 12 to 17, Pope Francis visited Mexico both as head of the church and as head of the Vatican. Expectations were enormous, as much for Mexico’s government as for the church and its followers, of which there are some 100 million—a number that, as a percentage of Mexico’s population, has diminished from 95 percent to 84 percent in the last 25 years.
As a liberal and a reformer in a Catholic church that…