About half of current religious “nones” who were raised in a religion (49%) indicate that a lack of belief led them to move away from religion. This includes many respondents who mention “science” as the reason they do not believe in religious teachings, including one who said “I’m a scientist now, and I don’t believe in miracles.”

Perhaps the most striking trend in American religion in recent years has been the growing percentage of adults who do not identify with a religious group. And the vast majority of these religious “nones” (78%) say they were raised as a member of a particular religion before shedding their religious identity in adulthood.

As part of a new survey connected to our broader Religious Landscape Study, we asked these people to explain, in their own words, why they no longer identify with a religious group. This resulted in hundreds of different responses (after all, everyone’s religious experience is a bit different), but many of them shared one of a few common themes.

About half of current religious “nones” who were raised in a religion (49%) indicate that a lack of belief led them to move away from religion. This includes many respondents who mention “science” as the reason they do not believe in religious teachings, including one who said “I’m a scientist now, and I don’t believe in miracles.” Others reference “common sense,” “logic” or a “lack of evidence” – or simply say they do not believe in God. 

But there are other reasons people give for leaving behind their childhood religion. One-in-five express an opposition to organized religion in general. This share includes some who do not like the hierarchical nature of religious groups, several people who think religion is too much like a business and others who mention clergy sexual abuse scandals as reasons for their stance.

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