Liberal churches are dying. But conservative churches are thriving.

Over the last five years, my colleagues and I conducted a study of 22 mainline congregations in the province of Ontario. We compared those in the sample that were growing mainline congregations to those that were declining. After statistically analyzing the survey responses of over 2,200 congregants and the clergy members who serve them, we came to a counterintuitive discovery: Conservative Protestant theology, with its more literal view of the Bible, is a significant predictor of church growth while liberal theology leads to decline. The results were published this month in the peer-reviewed journal, Review of Religious Research.

We also found that for all measures, growing church clergy members were most conservative theologically, followed by their congregants, who were themselves followed by the congregants of the declining churches and then the declining church clergy members. In other words, growing church clergy members are the most theologically conservative, while declining church clergy members are the least. Their congregations meet more in the middle.

For example, we found 93 percent of clergy members and 83 percent of worshipers from growing churches agreed with the statement “Jesus rose from the dead with a real flesh-and-blood body leaving behind an empty tomb.” This compared with 67 percent of worshipers and 56 percent of clergy members from declining churches. Furthermore, all growing church clergy members and 90 percent of their worshipers agreed that “God performs miracles in answer to prayers,” compared with 80 percent of worshipers and a mere 44 percent of clergy members from declining churches.