| Acknowledgements | 第4-5页 |
| 摘要 | 第5-7页 |
| Abstract | 第7-8页 |
| Chapter 1 Introduction | 第11-18页 |
| 1.1 Research Rationale | 第11-12页 |
| 1.2 Basic Concepts as Research Background | 第12-16页 |
| 1.3 Purpose of the Study and Research Question | 第16-18页 |
| Chapter 2 Literature Review | 第18-24页 |
| 2.1 The Development of American Isolationism | 第18-19页 |
| 2.2 The Factors Influencing American Isolationism | 第19-21页 |
| 2.3 The Interrelation Between Isolationism and Internationalism | 第21-22页 |
| 2.4 The Research Gap | 第22-24页 |
| Chapter 3 Influencing Factors of the Early Isolationism | 第24-38页 |
| 3.1 The Historical Background | 第24-25页 |
| 3.2 Factors Influencing the Early Isolationism | 第25-36页 |
| 3.2.1 The Political Factor: Independence | 第25-29页 |
| 3.2.2 The Economic Factor: Survival & Mercantilism | 第29-33页 |
| 3.2.3 The Social Factor: Puritanism & Great Pamphlet | 第33-36页 |
| 3.3 Analysis and Discussions | 第36-38页 |
| Chapter 4 Influencing Factors of the Isolationism Between the Wars | 第38-50页 |
| 4.1 The Historical Background | 第38-39页 |
| 4.2 Factors Influencing the Isolationism Between the wars | 第39-48页 |
| 4.2.1 The Political Factor: "Normalcy"&Fairness | 第39-44页 |
| 4.2.2 The Economic Factor: Serious Economic Difficulties | 第44-47页 |
| 4.2.3 The Social Factor: The Spread of Anger&Publications | 第47-48页 |
| 4.3 Analysis and Discussions | 第48-50页 |
| Chapter 5 Influencing Factors of Neo-isolationism During Trump Administration | 第50-56页 |
| 5.1 The Historical Background | 第50-51页 |
| 5.2 Factors Influencing Neo-isolationism | 第51-55页 |
| 5.2.1 The Political Factor: US Domestic Crisis | 第51-53页 |
| 5.2.2 The Economic Factor: Increasing Challenges | 第53-54页 |
| 5.2.3 The Social Factor: Public Woes | 第54-55页 |
| 5.3 Analysis and Discussions | 第55-56页 |
| Chapter 6 Conclusion | 第56-60页 |
| 6.1 Conclusion of the Thesis | 第56-60页 |
| 6.2 Contributions | 第60页 |
| 6.3 Limitations and Directions for Future Research | 第60页 |
| Works Cited | 第60-69页 |
