The fastest growing religious preference today is “no preference.” Those opting out of organized religion are not necessarily antagonistic atheists. They simply view the church as irrelevant.
In some ways the church is a victim of its own success.
During Europe’s Middle Ages, alleviation of human suffering and ignorance was the responsibility of the Church. No one else was concerned with the vast majority of human society: the poor (most of the population), the sick, the abused. Kings and nobles concerned themselves with land and power. When high church officials became like their secular counterparts, monastic and other movements called a remnant back to the path of service.
Gradually, as modern states arose, the Christian conscience infiltrated the greater society. Great Britain abolished the slave trade. Governments set up schools, hospitals, orphanages, and insane asylums. Religious groups still carry on this work in less developed countries, but secular organizations, like Doctors Without Borders, have joined them.
Today, birth, marriage, and death registration are performed by the state. Only the very devout mark the births of their children in religious ceremonies. Fewer and fewer couples bother to marry, even when they have children.
Yet the needs remain, the needs that spawned the growth of Christianity centuries ago. In a rootless, alienated, angst-ridden society, Christians offer the antidotes of commitment, community, and hope. The ancient agape love of the early Christians is as much an answer to postmodern society as it was to that of the Roman Empire.
Christianity cannot be sustained by laws. It never could, and Christians put their faith in peril whenever they ally with Caesar.
Christians now must practice religion the old-fashioned way: through intentional communities of faith to carry out callings of love, discipleship, and ministry.