decline christianity religion pew united population affiliation younger declining righteousness selfless pace accelerates jobsanger generations still collapsing attendance dati eastertide
decline religiosity attendance christianity pew membership orthodox tobin protestant 1970s
religion protestant among decline data protestants affiliation current demographic broadly distributed groups been has
gallup religion religious church membership affiliation poll millennials generation down past decades graph generational trends bar percentage american time sharply
decline graph religiosity america years year religious great religion low church over states united before trend moral last hits canada