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In page Christian rock:

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The musical genre that was once rejected by mainstream Christian churches is now considered by certain churches as one of the most important evangelism tools of their congregations.[citation needed] According to Terri McLean, author of New Harmonies, old-guard churches (United Methodist is given as an example) of the late 1990s were experiencing a rapid decline in membership and were under threat of disbandment within the next decade, a trend that has been going on since the 1980s.[3] McLean, using numerous quotes from theologians, Christian apologists and professors, points to traditional music styles as the reason for the falling popularity of more traditionalist churches.[4]