The policy-oriented approach of the New Haven School is widely recognized as a major contribution to the legal and jurisprudential debate on interpretation. Eschewing mechanical textual methods, on the one hand, and anti-textual, solipsistic methods, on the other, the New Haven School has developed a comprehensive and systematic approach to the interpretation of human communication. Drawing upon psychology, legal experience, and communications theory, of which Lasswell was a founder, the authors have developed a theoretically cogent and practical method of interpretation. In the course of doing it, they survey the existing literature, showing its problems. In addition to the original text of The Interpretation of Agreements, this edition includes a new introduction, in which developments since the appearance of the book are examined and appraised, and three important papers which elaborate the theory developed here, including Professor McDougal's scathing critique of the last major international conference on the law of treaties.