"With intellectual precision and autobiographical candor, this book unpacks the causes and consequences of ideological division. Buchanan skillfully weaves together philosophical analysis, empirical evidence, and personal insight to reveal how tribalism erodes our shared humanity and democracy itself. Both compelling and insightful, it is an invaluable resource for anyone committed to safeguarding democracys future." -- Michael Hannon, Associate Professor of Philosophy, University of Nottingham, UK. With intellectual precision and autobiographical candor, this book unpacks the causes and consequences of ideological division. Buchanan skillfully weaves together philosophical analysis, empirical evidence, and personal insight to reveal how tribalism erodes our shared humanity and democracy itself. Both compelling and insightful, it is an invaluable resource for anyone committed to safeguarding democracys future. Michael Hannon, Associate Professor of Philosophy, University of Nottingham, UK