The Pilgrims had the courage to act on their commitments, no matter what. Do we?

Sociologist Robert Bellah, author of Habits of the Heart, is impressed by the power of religion. He once said, "We should not underestimate the significance of the small group of people who have a new vision of a just and gentle world. The quality of a culture may be changed when two percent of its people have a new vision (and act on it)."

Christians make up far more than two percent of most town, far more than two percent of Americans. So, why don't we have a greater effect: on …