Affiliation with organized religion is at a 50-year low among young people, according to a study by the Pew Research Center's Forum on Religion. The study focused on the generation known as The Millennials -- those under 30, born after 1980.

But the data "doesn't necessarily mean that young people are more secular," says Greg Smith, one of the researchers who conducted the study.

According to the study, one in four people (25 percent) between 18 and 30 say they are "unaffiliated."

By comparison, one in five (20 percent) Generation Xers -- people born between 1965 and 1980 -- identified themselves as unaffiliated at the same age. 

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