In 'Lost Connections,' Johann Hari challenges the conventional understanding of depression and anxiety, arguing that they are not solely caused by chemical imbalances but by disconnections from meaningful work, people, values, and a hopeful future. Hari embarks on a global journey, interviewing leading experts and individuals with lived experience, to uncover nine potential causes of these widespread issues, ranging from loneliness to economic insecurity. The book advocates for a more holistic approach to mental well-being, emphasizing the crucial role of human connection and purpose, and offers a compelling vision for reclaiming mental health through addressing these societal and personal root causes.