About this book:

"Rules of War: The Development of International Humanitarian Law and Ethics of Warfare" traces the long and complex evolution of legal and moral constraints on armed conflict, from ancient codes to modern treaties and tribunals. The book begins by examining early restraints on warfare found in texts like Hammurabi's Code, the Mahabharata, and Islamic jurisprudence, which often intertwined pragmatic concerns about order and reputation with ethical or religious injunctions. It then delves into the philosophical foundations of Just War theory, primarily through the contributions of Augustine and Aquinas, who systematized criteria for when and how war could be morally justified.

The narrative progresses through key historical developments that shaped International Humanitarian Law (IHL), including the chivalric codes of medieval Europe, Hugo Grotius's foundational work on the Law of Nations, and the Lieber Code, which offered national guidance during the American Civil War. Subsequent chapters detail the internationalization of these norms through the Hague Conventions, which focused on the means and methods of warfare, and the Geneva Tradition, which progressively expanded protections for the wounded, prisoners of war, and eventually, civilians through a series of conventions from 1864 to 1949 and its Additional Protocols in 1977.

A significant portion of the book is dedicated to the mechanisms of accountability and the specific challenges faced by IHL. It covers the landmark war crimes trials at Nuremberg and Tokyo, which established individual criminal responsibility, and the subsequent evolution from ad hoc tribunals to the permanent International Criminal Court. The core principles of IHL—distinction, proportionality, necessity, and humanity—are analyzed in depth, along with their application to the protection of civilians, humanitarian access, and the treatment of prisoners of war. The book also addresses specific categories of weapons, examining the prohibitions and enforcement surrounding chemical and biological weapons, and the campaigns to ban indiscriminate arms like landmines and cluster munitions. The unique challenges posed by nuclear weapons, deterrence, and the nuclear taboo are also explored.

Finally, the text delves into contemporary and emerging issues that test the adaptability of IHL. It scrutinizes the complexities of non-international armed conflicts, the laws governing occupation, siege warfare, and starvation as methods of war. It also addresses the protection of cultural property and the environment in armed conflict, before concluding with detailed discussions on the legal and ethical dilemmas presented by targeted killing, drones, remote warfare, cyber operations, autonomous weapons systems, and the role of private military and security companies. The book ends by reflecting on the persistent challenges of compliance and enforcement, and the future trajectory of international humanitarian law in an ever-evolving landscape of conflict.