Globally, 1 in 10 adults under 55 have left their childhood religion
The share of people who retain their childhood religious identity in adulthood varies across religious categories.
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The Global Religious Futures (GRF) project is jointly funded by The Pew Charitable Trusts and The John Templeton Foundation. Here are some big-picture findings from the GRF, together with context from other Pew Research Center studies.