This book offers an authentic and original perspective on the principles of solidarity and rule of law that are variously interconnected and increasingly invoked in international relations and affairs, especially in the context of the European Union, where they are among the founding values common to all Member States.The innovative approach the authors adopt consists in the joint reading of these two principles within the broader framework of EU security, thus offering a new interpretation and fertile ground for further research.Divided into four parts, the authors consider EU security to be...