'Publications are often oriented towards other disciplines and focus more on other - also important - political, sociological, economic and ethical questions. These need to be complemented by a legal perspective, and Tonkin's well-structured and informed approach towards US and UK state practices is especially helpful, setting her apart from other authors. Therefore, this book is a gain and an inspiration to every reader who seeks clarity on legal state obligations.' Patricia Schneider, St Antony's International Review