Pew Research Center’s Faith in Flux survey (2009) found that among US adults who were raised in a religion and became unaffiliated, 65% of former Catholics and 50% of former Protestants left because they had stopped believing the religion’s teachings, and 71% “just gradually drifted away” — doubt about the group’s claims is the dominant exit reason. That 65% is the inaction-side proxy used here. It is a proxy, not a direct measure: no survey reaches current members of high-control groups to ask how many privately doubt, because external researchers are denied access. Clinical literature drawing on Lifton’s thought-reform research confirms that coercive control suppresses expressed doubt without eliminating internal cognitive dissonance, which is why doubt becomes visible mainly at exit — making the leavers’ figure a defensible directional proxy for in-group doubt, while remembering the population is people who already left, not people who stay.
On the action side, a peer-reviewed qualitative study of 18 people who left high-cost religious communities in Finland (Björkmark, Nynäs & Koskinen, Journal of Religion and Health, 2021) found that leaving involves fear, guilt, sorrow, pain, loss and existential suffering, and that building a new identity is a lifelong process — alongside eventual joy, freedom, relief, gratitude and empowerment. It is a thematic study of 18 interviews and reports no percentage; there is no survey that measures how many leavers of high-control groups suffer prolonged post-exit distress. ICSA exit research contextualizes the pattern: the structural cost of leaving is the severing of all pre-exit relationships through shunning, a cost that most leavers ultimately judge as worth paying. The action-side figure shown here (~20%) is therefore a rough directional proxy for severe post-exit distress, not a measured rate — most leavers in the qualitative literature ultimately do not regret the decision itself.
The 45-point gap is the largest in this entry set and should be read with caution. The proxy_only flag reflects genuine measurement difficulty: members are trained to suppress doubt, direct access to current members is denied to external researchers, and the inaction-side figure is borrowed from a survey of people who had already left a faith rather than people still inside a high-control group. The two proxies measure different phenomena in different populations — prolonged post-exit distress among leavers versus disbelief in the teachings among those who left a childhood faith — and the gap likely overstates the true asymmetry. What the data support clearly is the directional pattern: the structural costs of leaving are high and visible, while the costs of staying accumulate quietly as suppressed doubt that is rarely expressed until exit occurs.