One of the most prominent and urgent problems in international governance is how the different branches and norms of international law interact and what to do in the event of conflict. With no single 'international legislator' and a multitude of states, international organisations and tribunals making and enforcing the law, the international legal system is decentralised. This leads to a wide variety of international norms, ranging from customary international law and general principles of law, to multilateral and bilateral treaties on trade, the environment, human rights, the law of the sea, etc. Pauwelyn provides a framework on how these different norms interact, focusing on the relationship between the law of the World Trade Organisation (WTO) and other rules of international law. He also examines the hierarchy of norms within the WTO treaty. His recurring theme is how to marry trade and non-trade rules, or economic and non-economic objectives at the international level.

In The Right to Food and the World Trade Organization’s Rules on Agriculture: Conflicting, Compatible, or Complementary?, Rhonda Ferguson explores the relationship between the human right to food and agricultural trade rules. She questions whether States can adhere to their obligations under both regimes simultaneously. These two regimes are frequently portrayed to be in tension with one another. The content and contours of the right to food under international human rights law and WTO rules on domestic supports, export subsidies, and market access are considered through the lens of norm conflict theories. The analysis is situated within the context of the debate surrounding the fragmentation of international law.

Peremptory Norms of General International Law (Jus Cogens): Disquisitions and Dispositions is a collection of contributions on various aspects of jus cogens in international law.

Beyond Human Rights, previously published in German and now available in English, is a historical and doctrinal study about the legal status of individuals in international law.

A richly textured account of the making, implementing, and changing of international legal regimes, which encompasses law, politics and economics.

This book describes how international law regulates the problems that arise where economic activity meets violent conflict.

The Nature of International Law provides a comprehensive analytical account of international law within the prototype theory of concepts.

Whilst the concept of jus cogens has grown increasingly more important in public international law, lawyers remain hugely divided both over what precisely confers a jus cogens status on a norm, and what this conferral implies in terms of legal consequences. In this ground-breaking book, Ulf Linderfalk clearly and succinctly explores the reasons for this divide in order to facilitate more rational and productive future discourse.