The meek shall inherit the Earth...

The growing power and influence of evangelical Christians is manifest everywhere these days, from the best-seller lists to the White House, but in fact their share of the general population has not changed much in half a century. Most pollsters agree that people who identify themselves as white evangelical Christians make up about a quarter of the population, just as they have for decades.

What has changed is the class status of evangelicals. In 1929, the theologian H. Richard Niebuhr described born-again Christianity as the "religion of the disinherited." But over the last 40 years, evangelicals have pulled steadily closer in income and education to mainline Protestants in the historically affluent establishment denominations. In the process they have overturned the old social pecking order in which "Episcopalian," for example, was a code word for upper class, and "fundamentalist" or "evangelical" shorthand for lower.

Evangelical Christians are now increasingly likely to be college graduates and in the top income brackets. Evangelical C.E.O.'s pray together on monthly conference calls, evangelical investment bankers study the Bible over lunch on Wall Street and deep-pocketed evangelical donors gather at golf courses for conferences restricted to those who give more than $200,000 annually to Christian causes.

Their growing wealth and education help explain the new influence of evangelicals in American culture and politics. Their buying power fuels the booming market for Christian books, music and films. Their rising income has paid for construction of vast mega-churches in suburbs across the country. Their charitable contributions finance dozens of mission agencies, religious broadcasters and international service groups...

As the denomination grew, Assemblies preachers began speaking not only of heavenly rewards but also of the material blessings God might provide in this world. The notion was controversial in some evangelical circles but became widespread nonetheless, and it made the Assemblies' faith more compatible with an upwardly mobile middle class.

By the 1970's, Assemblies churches were sprouting up in affluent suburbs across the country. Recent surveys by Margaret Poloma, a historian at the University of Akron in Ohio, found Assemblies members more educated and better off than the general public.

As they flourished, evangelical entrepreneurs and strivers built a distinctly evangelical business culture of prayer meetings, self-help books and business associations. In some cities outside the Northeast, evangelical business owners list their names in Christian yellow pages.