What is the Religious Diversity Index (RDI) and how is it measured?

The Religious Diversity Index is a mathematical scale developed by the Pew Research Center to measure how evenly a population is divided among different religious groups. Borrowing formulas from ecology and economics, the index scores countries from zero to ten. A score of zero represents a complete religious monoculture, while a perfect ten would indicate a population split exactly evenly between seven major categories: Christians, Muslims, Hindus, Buddhists, Jews, the religiously unaffiliated, and "others." Currently, Singapore holds the highest RDI in the world with a score of 9.3.

What are "nones" and why are people increasingly joining this group?

"Nones" is a term used to describe the religiously unaffiliated, a diverse group that includes atheists, agnostics, and those who identify as "nothing in particular." The primary driver for joining this group is a lack of belief, with about 51% of those who left their childhood religion stating they simply stopped believing in the teachings. Other major factors include a gradual "drift" away from faith during young adulthood (typically before age 30), a lack of trust in religious institutions or leaders, and the belief that one can be a moral person without being a member of a religious organization.

How does a person's upbringing influence whether they stay in their childhood religion?

Research shows that the "vibe" of a household is a stronger predictor of religious retention than the mere performance of rituals. In households with high religious activity and a "mostly positive" experience, approximately 84% of children stay in their faith as adults. Conversely, if the experience is perceived as negative or restrictive, only about 24% remain affiliated. Additionally, the window between ages 18 and 30 is considered a critical period; 85% of people who decide to switch or leave their religion do so before they turn 30.

What is "heritage religion" and how does it differ from traditional faith?

Heritage religion, or "belonging without believing," occurs when secular individuals invoke religious symbols or traditions as markers of national or cultural identity rather than out of theological conviction. This trend is particularly visible in Europe and Russia, where people may defend the presence of crucifixes or church bells as "national markers" against perceived external threats like immigration. In these cases, religion functions as a cultural "uniform" for a team, even if the individuals involved do not participate in the actual religious worship or subscribe to the underlying doctrines.

Global religious trends and the rise of the unaffiliated

Q: Why is Buddhism the only major religion currently seeing a decline in global adherents?

Buddhism is experiencing a unique decline primarily due to massive generational shifts and demographic trends in East Asia. In countries like Japan and South Korea, over 40% of people raised Buddhist now identify as religiously unaffiliated, often trading traditional practices like family altars for secular or digital alternatives. Furthermore, many countries with high Buddhist populations, such as China and Thailand, have fertility rates well below the replacement level, meaning their populations are shrinking compared to the rapid growth seen in highly religious regions like Sub-Saharan Africa.

30 min

31. März 2026

Society Social Science Philosophy

Why is Buddhism declining while other faiths shift south? Explore how demographic changes and secularization are rewriting the story of modern faith.

Bestes Zitat aus Global religious trends and the rise of the unaffiliated

We are moving from a world of inherited faith to a world of negotiated faith; whether it’s through a court case, a TikTok video, or a conversation at the dinner table, we are all now in the business of negotiating what is sacred.

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"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

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"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

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"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

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"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

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"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

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"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

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"Makes me feel smarter every time before going to work"

@Cashflowbubu

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"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

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"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

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"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

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Global religious trends and the rise of the unaffiliated

30 min

31. März 2026

Society Social Science Philosophy

Why is Buddhism declining while other faiths shift south? Explore how demographic changes and secularization are rewriting the story of modern faith.

Bestes Zitat aus Global religious trends and the rise of the unaffiliated

We are moving from a world of inherited faith to a world of negotiated faith; whether it’s through a court case, a TikTok video, or a conversation at the dinner table, we are all now in the business of negotiating what is sacred.