She says this "imposter'' faith is one reason teenagers abandon churches.
"If this is the God they're seeing in church, they are right to leave us in the dust," Dean says. "Churches don't give them enough to be passionate about."
What traits passionate teens share
Dean drew her conclusions from what she calls one of the most depressing summers of her life. She interviewed teens about their faith after helping conduct research for a controversial study called the National Study of Youth and Religion.
The study, which included in-depth interviews with at least 3,300 American teenagers between 13 and 17, found that most American teens who called themselves Christian were indifferent and inarticulate about their faith.
The study included Christians of all stripes -- from Catholics to Protestants of both conservative and liberal denominations. Though three out of four American teenagers claim to be Christian, fewer than half practice their faith, only half deem it important, and most can't talk coherently about their beliefs, the study found.
Many teenagers thought that God simply wanted them to feel good and do good -- what the study's researchers called "moralistic therapeutic deism."
Some critics told Dean that most teenagers can't talk coherently about any deep subject, but Dean says abundant research shows that's not true.
"They have a lot to say," Dean says. "They can talk about money, sex and their family relationships with nuance. Most people who work with teenagers know that they are not naturally inarticulate."
In "Almost Christian," Dean talks to the teens who are articulate about their faith. Most come from Mormon and evangelical churches, which tend to do a better job of instilling religious passion in teens, she says.
