This article is the first in my series of articles exploring the application of complex adaptive systems (CAS) theory to legal systems. It builds the basic model of CAS and maps it onto legal systems, offering some suggestions for what it means in terms of legal institution and instrument design.

This collection of essays explores the different ways the insights from complexity theory can be applied to law. Complexity theory – a variant of systems theory – views law as an emergent, complex, self-organising system comprised of an interactive network of actors and systems that operate with no overall guiding hand, giving rise to complex, collective behaviour in law communications and actions. Addressing such issues as the unpredictability of legal systems, the ability of legal systems to adapt to changes in society, the importance of context, and the nature of law, the essays look to the implications of a complexity theory analysis for the study of public policy and administrative law, international law and human rights, regulatory practices in business and finance, and the practice of law and legal ethics. These are areas where law, which craves certainty, encounters unending, irresolvable complexity. This collection shows the many ways complexity theory thinking can reshape and clarify our understanding of the various problems relating to the theory and practice of law.

'Over recent years Complexity Science has revealed to us new limits to our possible knowledge and control in social, cultural and economic systems. Instead of supposing that past statistics and patterns will give us predictable outcomes for possible actions, we now know the world is, and will always be, creative and surprising. Continuous structural evolution within such systems may change the mechanisms, descriptors, problems and opportunities, often negating policy aims. We therefore need to redevelop our thinking about interventions, policies and policy making, moving perhaps to a humbler, more 'learning' approach. In this Handbook, leading thinkers in multiple domains set out these new ideas and allow us to understand how these new ideas are changing policymaking and policies in this new era.' - Peter M Allen, Cranfield University, UK

A global overview of evidentiary reasoning with contributions from leading authorities from different legal traditions and four continents.

Attacks by network-based transnational terrorist groups cause on average 25,000 deaths every year worldwide, with the law enforcement agencies of some states facing many challenges in bringing those responsible to justice. Despite various attempts to codify the law on transnational terrorism since the 1930s, a crime of transnational terrorism under international law remains contested, reflecting concerns regarding the relative importance of prosecuting members of transnational terrorist groups before the International Criminal Court. This book critically examines the limits of international criminal law in bringing members of transnational terrorist groups to justice in the context of changing methods of warfare, drawing from human rights, sociology, and best practices in international criminal justice. Drawing on organisational network theory, Anna Marie Brennan explores the nature of international crimes and assesses the potential for the International Criminal Court to prosecute and investigate alleged crimes perpetrated by members of transnational terrorist groups, paying particular attention to their modus operandi and organisational structure. This book argues that because of the network-based organisational structure of some transnational terrorist groups, achieving justice for victims will prove challenging, in the context of the relationship between the commanders and the subordinate members of the group requiring a re-evaluation of accountability mechanisms at the international level. In advancing an innovative perspective on the accountability of members of transnational terrorist groups, and in offering solutions to current challenges, the book will be of great interest and use to academic, practitioners, and students engaged in the study of terrorism, the ICC, or international humanitarian law.

Presents the first comprehensive reflection on the nature of environmental law scholarship from the perspectives of leading scholars in the field.