Chronic loneliness and social isolation have been consistently linked to detrimental effects on physical and mental health and increased risk of early death. Credit: Shutterstock

By Joseph Chamie
PORTLAND, USA, Feb 24 2026 (IPS)

Loneliness is a significant health concern on planet Earth. It affects virtually every aspect of human wellbeing and development worldwide.

As loneliness knows no borders and impacts individuals of all ages and socio-economic background, it has become a major public health issue. Social isolation is now being taken seriously enough to prompt intervention by governments, international agencies, institutions, and communities.

Chronic loneliness and social isolation have been consistently linked to detrimental effects on physical and mental health and increased risk of early death. The World Health Organization (WHO) has recognized loneliness as a pressing global health threat and a defining challenge of our time.

To address this problem, WHO launched an international commission on social connection in November 2023. The commission aimed to have loneliness recognized and resourced as a global public health priority.

The commission issued a report in June 2025 that highlighted three messages. First, social disconnection is widespread, across all regions and age groups. Second, its impacts are severe, affecting health, well-being, and development. And third, solutions exist and should be scaled up urgently.

Additionally, in a 2023 report, the U.S. Surgeon General reported that loneliness increases one’s risk for cardiovascular disease, dementia, stroke, and premature death. Persistent loneliness was reported to be worse for your health than being sedentary or obese and is similar to smoking more than half a pack of cigarettes a day.

The complex interactions among societal changes, technological advancements, especially artificial intelligence, and the Covid-19 pandemic, which reduced economic and social activities, have contributed to increasing levels of loneliness and social isolation. People are meeting in person less frequently than in the past, while self-reported feelings of connection have recently shown signs of worsening.

According to a 2023 Meta-Gallup global survey encompassing 142 countries, 24% of those aged 15 and older, totaling 1.5 billion people worldwide, reported feeling very lonely or fairly lonely on a regular basis. Additionally, 27% or 1.7 billion people reported feeling a little lonely, while 49% or 3 billion people reported not feeling lonely at all (Figure 1).

Source: Meta-Gallup Survey.

Those surveyed who reported feeling lonely were 36 percentage points more likely to experience sadness than those who did not feel lonely. They were also 30 percentage points more likely to experience worry and stress compared to their counterparts who did not experience loneliness. These findings underscore the significant physical and mental health effects of frequent feelings of loneliness and social isolation.

The level of loneliness reported in the 2023 Gallup poll varies significantly across countries, ranging from a high of 45% in Comoros to a low of 6% in Vietnam. In 22 countries, the percentage of adults who felt lonely the day before exceeded 30%, with more than half of them located in Africa (Figure 2).

Source: Gallup Survey.

While loneliness varies significantly among countries, no country is immune to it. Loneliness is not just seen as a personal challenge, but also as a matter of public policy.

Loneliness affects all age groups, but young adults seem to be the most vulnerable. Around 30% of them report feeling lonely every day, with about 63% experiencing significant symptoms of anxiety and depression related to loneliness

Loneliness affects all age groups, but young adults seem to be the most vulnerable. Around 30% of them report feeling lonely every day, with about 63% experiencing significant symptoms of anxiety and depression related to loneliness.

Among older adults, feelings of loneliness decrease, with about 17% of those aged 65 and older reporting loneliness. However, many older adults face isolation due to factors such as declining health, loss of social connections, or decreased mobility. Loneliness is also linked to increased risks of developing dementia, coronary artery disease or stroke.

A follow-up international survey conducted by Gallup in 2024 found that 23% of respondents felt lonely “a lot of the day” just the day before the survey. Additionally, approximately one in five employees worldwide reported experiencing loneliness a lot the previous day.

Moreover, loneliness is more prevalent among employees under the age of 35 than those aged 35 and older. Loneliness also contributes to significant economic and social strain, reducing productivity, and impacting education.

The Gallup survey found that financial status has a strong effect on loneliness worldwide. Men and women who are struggling financially, meaning they find it difficult to get by on their present income, are about twice as likely as those who are better off financially to say they felt lonely a lot the previous day. Additionally, unmarried individuals are more likely to feel lonely than those who are married or in a domestic partnership.

Social isolation and chronic loneliness have long-term negative consequences on the physical and mental health of individuals. Health studies have found that the risk of mortality among people who lack community and social ties is two times greater than that of people who have many social contacts. A WHO report found that loneliness is linked to an estimated 100 deaths every hour, totaling more than 871,000 deaths annually.

Other effects of loneliness and social isolation include a shortened lifespan, cognitive decline, exacerbated mental illness, reduced quality of sleep, higher stress and anxiety levels, adoption of unhealthy habits, and self-loathing thoughts. Strong social connections can lead to better health and reduce the effects of loneliness (Table 1).

Source: Author’s compilation based on health studies.

A variety of factors can contribute to an individual experiencing loneliness, and the scope, duration, and intensity of loneliness can vary. In many cases, there is no single cause, but rather a number of factors that can overlap and intensify each other.

Some of the factors contributing to loneliness are internal, while others are external. Internal factors often involve the way people see themselves and the world around them. They can also include shyness, introversion, low self-esteem, lack of communication skills, and social withdrawal. On the other hand, external factors include physical isolation, relocation, bereavement, divorce, physical disabilities, social exclusion, and over-reliance on social media.

Interacting with another person, even a stranger, can significantly reduce loneliness. Conversely, doing nothing to address social isolation tends to increase loneliness.

Some studies suggest that interacting with an AI companion can reduce loneliness.

Advocates argue that the latest AI chatbots might provide better company than many real people and societies should consider the benefits that AI companions could offer to those who are lonely. Soon, some believe, the most interesting, and maybe the most empathetic conversation that an individual could have will be with AI on almost any topic.

Instead of reacting with horror, advocates of AI chatbots suggest that societies should consider the benefits that AI companions could provide to those who are lonely. Some AI promoters maintain that an inability to relate to humans should not be viewed as a defect, but rather as a virtue.

AI chatbots are becoming increasingly popular as preferred confidants and companions. For example, a study of younger individuals discovered that one-third of teenagers use AI chatbots for social interaction. These teenagers have stated a preference for AI companions over humans for serious conversations, finding them more fulfilling than conversations with actual people.

Nevertheless, there are concerns about using AI companions to address loneliness. Health experts are warning that many individuals, particularly the youth, are developing emotional connections to AI chatbot companions.

Despite these concerns, individuals, especially young people, are seeking companionship and emotional support from AI chatbots. Some fear that relying on AI companions may result in younger generations forming emotional bonds with entities that lack the ability to empathize and care.

By recognizing the signs of loneliness, engaging in meaningful activities, and seeking professional assistance, individuals may be able to reduce their feelings of loneliness and social isolation. A combination of behavioral changes, social intervention, and professional support can be helpful in dealing with loneliness.

Additionally, managing stress resulting from loneliness can be facilitated by exercising, eating healthy, and getting enough sleep. Pursuing enjoyable hobbies and activities may also offer a distraction from loneliness.

Communicating one’s loneliness to family, friends, and colleagues can strengthen existing relationships and provide emotional support. To manage feelings of loneliness, it is also helpful for individuals to remain open to making new connections, stay healthy, and seek professional assistance.

Loneliness is a complex and pervasive issue that exists worldwide. However, there are ways to manage and address it. Methods aimed at reducing loneliness exist at the national, community, family, and individual levels. These methods include increasing awareness and modifying government policies to strengthen social infrastructure, foster inclusivity, and provide psychological support.

Joseph Chamie is a consulting demographer, a former director of the United Nations Population Division, and author of many publications on population issues.