Chapter 1: This Chapter Introduces The Book And Summarises The Contents Of Each Part. It States A Hypothesis That A New Principle Of Pacta Sunt Servanda Bona Fide, Based On Relational Contract Theory, Is Emerging In International Trade, Where Hardship Issues Arise In Performing Long-term Relational Supply Contracts. The Main Proposition Is That In The Context Of Hardship, The Parties To A Long-term Relational Supply Contract Have A Duty To Renegotiate The Contract Unless There Is A Compelling Reason Not To Do So. Additionally, The Judges Or Arbitrators Have The Power To Adapt The Contract Based On Good Faith, The Relational Nature, And The Characteristics Of The Contract. Where There Is A Complete Breakdown Of The Ongoing Contract Relationship Or The Adaptation Will Cause One Or The Adaptation Will Rewrite The Contract, The Judges Or Arbitrators Have The Power To Terminate It. Chapter 2: Chapter Two Will Examine The Nature And Characteristics Of Long-term Contracts And Long-term Relational Supply Contracts In Particular. A Definition Of A Long-term Relational Contract Is Also Proposed. To Refine The Scope Of The Book, And To Make The Arguments Stronger And More Acceptable, Chapter Two Will Emphasise The Extent To Which The Book Concentrates On Long-term Relational Supply Contracts In The Ensuing Chapters. Chapter 3: Chapter Three Will Discuss The Different Mechanisms Relating To Hardship In The Selected Domestic Laws, In The Cisg And In The Unidroit Principles. The Chapter Will Demonstrate That Good Faith Is Often Applied When Dealing With Hardship Issues. Chapter 4: Chapter Four Will Investigate Good Faith In Domestic Laws, The Cisg And The Unidroit Principles, To Address How It Is Applied To Deal With Hardship Issues And Why Good Faith Is Not Applied In English Law And Australian Law. It Will Argue That The Many Facets And Levels Of Good Faith Make It An Appropriate Tool For Tackling Issues Relating To Long-term Relational Supply Contracts In The