International Human Solidarity Day
Health is often understood as the outcome of medical care, genetics, or individual lifestyle choices. Yet a growing body of scientific evidence shows that human health is also deeply shaped by social relationships. Feeling supported, connected, and part of a community can influence how long we live, how well we cope with stress, and how resilient we are in times of crisis. In this sense, solidarity is not merely a moral value—it is a powerful, and measurable, determinant of health.
From a public health perspective, solidarity strengthens social cohesion, which is closely linked to better health outcomes. Communities characterized by trust, mutual support, and cooperation consistently show lower rates of chronic disease and higher life expectancy. One of the most robust findings in health research is that strong social relationships significantly reduce the risk of premature mortality, with effects comparable to well-known risk factors such as smoking or physical inactivity. Solidarity helps counteract social isolation, a condition increasingly recognized as a major threat to health in modern societies.
The mental health benefits of solidarity are particularly well documented. Psychological and neuroscientific studies demonstrate that prosocial behaviors—such as helping others, volunteering, and collective action—are associated with lower levels of depression, anxiety, and perceived stress. These behaviors activate neurobiological pathways involving oxytocin and endorphins, which promote emotional regulation and psychological well-being. Importantly, solidarity benefits both those who receive support and those who provide it, creating positive feedback loops within communities.
Solidarity also plays a vital role during health emergencies. In situations such as epidemics, natural disasters, or humanitarian crises, collective responsibility and mutual aid can significantly reduce health risks. Evidence from recent climate disasters, including the last year’s DANA extreme floods at Valencia, shows that educational communities with strong social cooperation and solidarity networks were better able to protect vulnerable people and act with resilience.
Solidarity fosters social environments that protect mental and physical well-being, enhance resilience, and reduce health inequalities. Recognizing solidarity as a public health resource is essential for building healthier, more resilient societies.
Editor of Daily 27.
Predoctoral researcher at the Department of Sociology in University of Barcelona.