This interdisciplinary project will address conceptual, psychological, and ethical issues of childhood and adolescent loneliness. The research retreat will bring together philosophers, psychologists, and sociologists to tackle such questions as: What is the nature of the experience of loneliness during childhood and adolescence? How severe are its effects? What are the online behaviours of lonely children and adolescents? Is it morally acceptable to encourage lonely children and adolescents to use social media as a surrogate for direct interaction? What rights, if any, do children and adolescents have against being socially isolated or lonely? If children prefer to be isolated, do we have good psychological and moral reasons to disregard their preferences? The retreat will isolate those questions that can only be addressed within an interdisciplinary framework. The retreat will also enable the researchers to press each other on those aspects of their work that rely on the other disciplines’ expertise. In addition to developing ideas for a number of single-authored and co-authored publications, the researchers aim to design a national survey on loneliness in young people. The researchers will also establish an international, interdisciplinary network of scholars interested in these issues and will make use of existing contacts with stakeholders to disseminate the conclusions outside academia.