The online harms young people face today are measurable, widespread, and increasingly difficult for families, schools, and civic leaders to ignore. Children and teens now live much of their lives through screens and the effects are measurable. The average teen reported spending an average of 4.8 hours a day on social media in 2023. Data from 2024 found that 95% have access to a smartphone and just under half reported being online “constantly”. This constant connectivity reshapes attention spans, emotional well-being, and social life. This is not a small cultural shift. It is resulting in a historic “rewiring of childhood”.
In The Anxious Generation, social psychologist Jonathan Haidt describes how overprotection in the physical world and underprotection online have created a perfect storm: children have fewer opportunities to develop independence in real life, while simultaneously being exposed, often without guidance, to an online environment engineered for constant engagement. The results are visible everywhere:
- Nearly 1 in 3 teen girls seriously considered suicide in 2021, up 60% from data ten years previous.
- Teens who experienced a major depressive episode rose from 8% to almost 16% in ten years.
- Globally, 20.9% of adolescents reported persistent loneliness.
But anxiety and depression are only part of the story. The harms of the digital world fall into five interconnected categories that together illustrate why young people are struggling — and what adults need to understand about their daily reality.
Online Harms Facing Children and Adolescents
1. Mental Health and Emotional Well-being
Social media platforms reward comparison, performance, and perfection. Teens, especially girls, experience continuous pressure to curate a “perfect persona,” leading to body-image distress, low self-esteem, and chronic stress. The CDC’s data on teen girls’ mental health reflects the cumulative impact: fear of exclusion, pressure to perform, and constant evaluation.
2. Relationships and Social Connection
Paradoxically, constant connection has made teens lonelier than ever. Digital communication is replacing in-person play, family interactions, and unstructured time — all critical for social development.
Teens who report high loneliness also experience:
- Lower academic performance
- Higher rates of depression
- Increased vulnerability to online manipulation
3. Self-Regulation, Sleep, and Addictive Design
Many of the tools children use daily are designed to override self-control. Infinite scroll, notifications, autoplay, and algorithmic reinforcement trigger dopamine reward pathways similar to addictive substances. Nighttime phone use habits are impacting sleep cycles as well. Teens who used phones in or before bed reported shorter sleep duration, earlier waking, and daytime fatigue.
Because the prefrontal cortex — the brain’s center for impulse control — continues developing into the mid-20s, children are uniquely vulnerable.
4. Learning, Focus, and Cognitive Development
Educators report that digital distractions and constant notification checking make sustained attention difficult. Studies show correlations between high social media use and:
- Lower working memory
- Reduced academic performance
- Difficulty with delayed gratification
- Decreased ability to manage complex tasks
Even high-quality educational tools compete against platforms engineered to be more stimulating and addictive.
5. Online Safety: Protecting Against Exposure, Exploitation, and Deception
Online activities expose young people to risks that did not exist two decades ago:
- Sexual content exposure
- Grooming, sextortion, and image-based sexual abuse (IBSA)
- Deepfakes and synthetic pornography
- Bullying and peer harassment
- False advice and dangerous challenges amplified by algorithms.
- 70% of teenagers encountered real-life violent content online in the past year, including fights, weapons, and gang activity. 65% of students witnessed online hate speech at least once in the past year.
These risks are not fringe. They are structural features of the modern digital ecosystem.
Why Civic Leaders Should Care
Haidt’s conclusion is blunt: the digital environment has become “psychologically unsafe for developing minds.”
But the most important insight from the research is that none of these harms exists in isolation. A teen who is:
- Sleep-deprived
- Lonely
- Overwhelmed by socializing
- Pulled into addictive feedback loops
- Exposed to extreme or harmful content
…is not just facing one problem — they are facing a cascade.
This helps explain why today’s youth mental health crisis is broader than anxiety and depression alone. It reflects a systemic mismatch between what young people need and the environment they are growing up in.
What Civic Leaders Can Do
These harms are not merely personal challenges; they are public-health, education, and civic-development issues.
Healthy, resilient young people become strong, productive adults. If the next generation is shaped primarily by digital forces designed for engagement rather than wellbeing, the consequences will ripple across communities, schools, workplaces, and democracies.
The Policy Circle exists to help citizens engage with the policies, institutions, and innovations that can close these gaps — and to foster conversations that build clarity, confidence, and shared responsibility. Our Protecting Children Online Policy Circle Brief is designed to do just that. Host a Circle on this critical and timely topic. Bring together women in your community to learn and take action to make your community more aware and safe from online harms.
Stay connected with us as we launch this new Brief and a collection of guides for parents navigating these difficult topics with kids and teens.
