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Social Network

Facebook

The original engagement-maximising social network.

Founded by Mark Zuckerberg in 2004 and operated by Meta Platforms. The platform pioneered the algorithmic news feed and remains the largest social network by monthly active users.

Documented Cognitive Harm Footprint
55
Harm Footprint
Moderate

A 2023 systematic review of 232 papers identified eight major psychological effects associated with Facebook use — perceived anxiety, depression, loneliness, eating disorders, lowered self-esteem, reduced life satisfaction, insomnia and stress — alongside three physiological effects, including measurable human brain alteration.

Harm Count
20 / 40
Severity
20 / 35
Reach
10 / 22
Mechanism
5 / 5
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Human Brain Alteration
2023 heavy users

Heavy use is associated with measurable human brain alterations and shifted affective experience states.

Source: 2023 systematic review of 232 papers on Facebook's psychological and physiological effects
Eating Disorders & Lowered Self-Esteem
2023 female users, adolescents

Associated with eating-disorder symptoms and reduced self-esteem, particularly among female users.

Source: 2023 systematic review of 232 papers on Facebook's psychological and physiological effects
Insomnia & Stress
2023 general adult population

Documented increases in self-reported insomnia and chronic stress, including measurable physiological stress markers.

Source: 2023 systematic review of 232 papers on Facebook's psychological and physiological effects
Anxiety, Depression & Loneliness
2023 general adult population

Use is significantly associated with elevated anxiety, depressive symptoms and self-reported loneliness across cohorts.

Source: 2023 systematic review of 232 papers on Facebook's psychological and physiological effects
Mark Zuckerberg Founder, CEO and controlling shareholder of Meta
What they say (Give)
Built a platform connecting billions of people for free communication.
What the public loses (Take)
Owns the platform whose use is associated with eight major psychological harms documented across 232 peer-reviewed papers.
What the platform gives

Free communication with distant family and friends; community groups for niche interests; small business marketing reach.

What the public loses

Documented anxiety, depression, loneliness, insomnia, stress and physiological brain changes — at population scale.

Mechanisms in play
See all mechanisms →