A survey of 35,000 individuals by the Pew Research Center found the percentage of Americans "who identify with some branch of the Christian faith" declined from 78.4 percent in 2007 (when a similar study was conducted) to 70.6 percent in 2014.
The decline was especially significant among Roman Catholics and mainline Protestant churches. Even the number of evangelical Protestants dropped, but at a slower rate. While the decline occurred in all age groups, it was the most dramatic among "millennials, those individuals who were born between 1980 and 2000.
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Christian writer and political activist Jim Wallis recounts a recent trip to a conference in South Korea hosted by three of that nation's largest evangelical and Pentecostal mega-churches. Wallis states that in contrast to evangelicals from wealthy nations of the global North, "these global South evangelicals spent their time together wrestling with issues of global economic inequality, the threat of climate change, the realities of racial injustice, and the need for Christians to wage peace instead of war." My guess is there was no shortage of millennials at this conference.
If Christian leaders in the U.S. do not act on the desire of many of the faithful to work for social justice issues, churches will continue to lose members, especially millennials. Then it's just a matter of time before some houses of worship are transformed into skateboard parks.