Summary of "How Religion Evolved"

Core Idea

Religion is a bonding technology, not primarily a belief system—it works through synchronized rituals that trigger endorphin release and create social cohesion.
Religious structures evolved in phases to match human group sizes: shamanic rituals for 50-150 people → formal religions for settlements → doctrinal religions for empires with millions.
Religion persists because humans are hardwired for small-scale community belonging; secular alternatives fail without the emotional/transcendental dimension that drives neurochemical bonding.

Synchronized movement + singing + rhythm activate endorphin release; effect is mechanical and works regardless of theological belief.
Rituals improve immune function, reduce pain, and increase prosocial behavior—effects are measurable and neurochemical, not psychological placebo.
Optimal congregation size is ~150 people; larger groups fragment naturally because mentalizing capacity (understanding others' minds) breaks down beyond this threshold.

All religions spawn cults/sects because humans evolved for bands of 50-150, not empires—internal stress exceeds bonding mechanisms at scale.
Charismatic leaders exploit this: they combine perceived divine authority with psychological credibility and endorphin-driven bonding, attracting splinter groups.
Warning signs of cult dynamics: excessive physical touch, sexual boundary violations, financial control, claims of divine authority.

Economic security reduces religiosity—religion remains strong only where inequality and disease stress persist.
Wealthy, low-disease societies see declining religious practice because communities have less existential need for bonding and meaning-making.
Disease prevalence directly correlates with religious intensity; high-pathogen regions show stronger in-group bonding and moralizing religions.

Cap congregations/groups at ~150; subdivide larger organizations into smaller units with dedicated ritual time.
Implement synchronized rituals before growth hits 150—formal structures prevent schism: structured singing, movement, or group practices (yoga, team sports, capoeira).
Combine 5-15 person intimate groups with larger gatherings; gender-tailor engagement (women: personalized connection; men: public/social participation).

Use synchronized activity (team rituals, group exercise, collaborative practice) to generate prosocial bonding without theology—frame as "wellbeing community."
Screen leaders for cult warning signs early; monitor boundary violations and financial/sexual control.
Test mentalizing capacity to assess optimal team/group size; individuals with lower mentalizing ability need smaller peer groups.

Identify your group size: Measure current congregation/team. If over 150, plan subdivision strategy.
Design a synchrony ritual: Add 10-15 min of coordinated movement, singing, or rhythmic activity to existing meetings—document wellbeing/retention metrics.
Establish administrative structure before reaching 150 members to prevent natural schism.
Screen leadership for boundary violations and excessive control claims; document these as early warning signals.
Measure outcomes: Track immune markers, pain reduction, prosocial behavior, and group cohesion post-ritual implementation.