This is the continent where some leading thinkers are talking about a "post-Christian Europe." And this is the country of philosopher Friedrich Nietzsche, who infamously quipped, "God is dead." So some may be surprised at the receptivity in Germany this week to visiting Pope Benedict XVI's message: Europe needs to rethink the thesis that secularism and economic progress go hand in hand. Coincidentally, some of Europe's stalwart secularists are challenging the idea that religious reasoning inevitably retreats from the public sphere as countries modernize. Germans themselves are modeling a growing acceptance of religion's role in shaping society: • Head of...