📚 Divisions between Realism and Liberalism | 现实主义与自由主义的分歧
Realism and liberalism are two foundational theories in A-level Politics, especially in the study of global politics. They offer sharply different answers to the same central question: why do states behave the way they do? Realism emphasises power, self-interest and the constant possibility of conflict, while liberalism highlights cooperation, interdependence and the transformative role of institutions. Understanding the divisions between them is essential for analysing war, diplomacy, trade and international organisations.
现实主义与自由主义是 A-level 政治学中两个基础性理论，在全球政治研究中尤其重要。它们对同一个核心问题给出了截然不同的回答：国家为何如此行事？现实主义强调权力、自利以及冲突的持续可能性，而自由主义则突出合作、相互依存以及制度的变革作用。理解两者的分歧对于分析战争、外交、贸易和国际组织至关重要。
1. Origins and Core Assumptions | 起源与核心假设
Realism has roots in the writings of Thucydides, Machiavelli and Hobbes. It assumes that international politics is a struggle for power among self-interested states. Liberalism draws on Locke, Kant and Wilson, and assumes that human reason, trade and law can mitigate conflict and promote collective progress.
现实主义源于修昔底德、马基雅维利和霍布斯的著作。它认为国际政治是自利国家之间争夺权力的斗争。自由主义则借鉴洛克、康德和威尔逊的思想，认为人类理性、贸易和法律可以缓解冲突并促进集体进步。
This difference of intellectual origin shapes every later division: realists begin from a pessimistic view of human nature, while liberals begin from an optimistic or at least perfectible view of human society.
这种思想起源上的差异塑造了后来的所有分歧：现实主义者从对人性的悲观看法出发，而自由主义者则从乐观或至少是可以完善的人类社会看法出发。
2. Human Nature: Egoism vs Cooperation | 人性：自私自利与协作合作
Realists view human beings as naturally self-interested, hungry for power and security. Because states are led by human beings, the same egoism is reproduced at the international level. Morality is secondary to survival and national interest.
现实主义者认为人天生自利，渴望权力与安全。由于国家由人领导，同样的利己主义在国际层面被复制。道德相对于生存和国家利益来说是次要的。
Liberals do not deny self-interest, but they argue that humans are also capable of empathy, rational cooperation and moral learning. Trade, education and open communication can strengthen these cooperative instincts and reduce the likelihood of war.
自由主义者并不否认自利，但他们认为人类也有同理心、理性合作和道德学习的能力。贸易、教育和开放交流可以强化这些合作本能，降低战争的可能性。
3. Anarchy and Its Consequences | 无政府状态及其后果
Both theories accept that the international system is anarchic: there is no world government above states. However, realists see anarchy as a permanent condition of insecurity. In a self-help system, states must rely on their own military and economic strength to survive.
两种理论都承认国际体系处于无政府状态：在国家之上没有世界政府。然而，现实主义者将无政府状态视为永久的不安全状况。在自助体系中，国家必须依靠自身的军事和经济实力来生存。
Liberals accept anarchy as a fact but not as a prison. They argue that anarchy can be managed through international law, regimes and institutions. Anarchy does not automatically lead to war; it can be tamed by shared rules and mutual interests.
自由主义者接受无政府状态这一事实，但不认为它是牢笼。他们认为无政府状态可以通过国际法、机制和制度加以管理。无政府状态并不必然导致战争；它可以通过共同规则和相互利益得到驯服。
4. Actors: States vs Multiple Actors | 行为体：国家与多元行为体
Realism is state-centric. It treats the sovereign state as the only actor that really matters in world politics. International organisations, NGOs and multinational corporations are seen as tools of powerful states or as marginal players.
现实主义以国家为中心。它将主权国家视为世界政治中唯一真正重要的行为体。国际组织、非政府组织和跨国公司被看作是大国的工具或边缘参与者。
Liberalism adopts a pluralist view. It recognises states as important, but also gives analytical weight to international organisations, civil society, individuals, firms and transnational networks. These actors can shape state preferences and create new avenues for cooperation.
自由主义采取多元主义观点。它承认国家重要，但也赋予国际组织、公民社会、个人、企业和跨国网络以分析权重。这些行为体可以塑造国家偏好，并创造新的合作途径。
5. Power and Security vs Interdependence | 权力与安全 vs 相互依存
For realists, power is the central currency of international politics. States seek relative power because only a favourable balance of power can guarantee security. Military force remains the ultimate arbiter of disputes.
对现实主义者而言，权力是国际政治的核心通货。国家追求相对权力，因为只有有利的均势才能保障安全。军事力量仍然是争端的最终裁决者。
Liberals argue that complex interdependence has changed the game. In a globalised world, states are linked by trade, finance, communication and environmental challenges. The costs of using force rise, and the benefits of cooperation become more attractive than unilateral aggression.
自由主义者认为，复合相互依存已经改变了游戏规则。在全球化的世界中，国家通过贸易、金融、通讯和环境挑战联系在一起。使用武力的成本上升，合作的收益比单边侵略更具吸引力。
6. Conflict and Cooperation | 冲突与合作
Realism predicts that conflict is an ever-present possibility because states cannot trust one another under anarchy. The security dilemma means that one state’s defensive build-up can appear threatening to others, prompting an arms race or even preventive war.
现实主义预测冲突始终是一种可能，因为在无政府状态下国家无法互相信任。安全困境意味着一国的防御性建设可能被他国视为威胁，从而引发军备竞赛甚至预防性战争。
Liberalism does not ignore conflict, but it argues that cooperation is possible and often more rational. Democracies tend not to fight each other under the democratic peace thesis, and economic ties create constituencies for peace.
自由主义并不忽视冲突，但认为合作是可能的，而且往往更加理性。根据民主和平论，民主国家之间倾向于不互相开战，经济联系也为和平创造了支持群体。
7. International Institutions | 国际制度的作用
Realists are sceptical about international institutions. The United Nations, NATO or the WTO can only work when powerful states allow them to work. Institutions cannot tame anarchy; they reflect the existing distribution of power.
现实主义者对国际制度持怀疑态度。联合国、北约或世贸组织只有在强国允许时才能发挥作用。制度无法驯服无政府状态；它们反映的是现有的权力分配。
Liberals see institutions as independent or semi-independent forces. They reduce uncertainty, provide information, lower transaction costs and help states commit to long-term cooperation. Institutions can socialise states into cooperative habits.
自由主义者将制度视为独立或半独立的力量。制度减少不确定性、提供信息、降低交易成本，并帮助国家对长期合作作出承诺。制度还能使国家养成合作的习惯。
8. Economic Relations: Relative vs Absolute Gains | 经济关系：相对收益与绝对收益
Realists focus on relative gains. A state may reject a trade deal that makes both sides richer if the rival gains more, because a stronger rival could threaten its security tomorrow. Economic power is subordinate to security concerns.
现实主义者关注相对收益。一国可能拒绝一项使双方都更富裕的贸易协议，如果对手获益更多，因为更强大的对手明天可能威胁其安全。经济权力从属于安全关切。
Liberals focus on absolute gains. If both sides are better off, cooperation is worthwhile even if one side gains slightly more. Trade creates mutual interests, and mutual interests reduce the incentives for war.
自由主义者关注绝对收益。如果双方都变得更好，即使一方获益稍多，合作也是值得的。贸易创造共同利益，而共同利益降低了战争动机。
9. Change and Continuity | 变革与延续
Realism is often accused of being static. It suggests that the logic of power politics has remained the same from ancient Athens to the modern world. Changes in technology or ideology may alter tactics, but not the fundamental pursuit of power and security.
现实主义常被批评为静态的理论。它暗示从古代雅典到现代世界，权力政治的逻辑始终未变。技术或意识形态的变化可能改变策略，但不会改变对权力与安全的根本追求。
Liberalism is more open to historical change. It argues that the spread of democracy, free trade, international law and human rights can transform international relations from a war system into a more peaceful and rule-based order.
自由主义更接受历史变化。它认为民主、自由贸易、国际法和人权的传播可以将国际关系从战争体系转变为更加和平和基于规则的秩序。
10. Exam Focus: How to Contrast the Two Theories | 考点聚焦：如何对比两种理论
In Edexcel A-level Politics, exam questions often ask you to compare realism and liberalism on issues such as the state, power, anarchy, institutions or globalisation. A strong answer should state the criterion of comparison, use accurate key terms and support each side with examples.
在 Edexcel A-level 政治学中，考题经常要求你比较现实主义与自由主义在国家、权力、无政府状态、制度或全球化等问题上的观点。高分答案应明确比较标准，使用准确的关键术语，并用例子支撑双方观点。
- Realism: Thucydides, Hobbes, Morgenthau, Waltz; key terms: self-help, security dilemma, balance of power, relative gains, national interest.
- 现实主义：修昔底德、霍布斯、摩根索、沃尔兹；关键术语：自助、安全困境、均势、相对收益、国家利益。
- Liberalism: Locke, Kant, Wilson, Keohane, Nye; key terms: interdependence, democratic peace, international institutions, absolute gains, collective security.
- 自由主义：洛克、康德、威尔逊、基欧汉、奈；关键术语：相互依存、民主和平、国际制度、绝对收益、集体安全。
A common error is to describe the theories separately without direct comparison. Use comparative phrases such as ‘whereas realists argue… liberals counter that…’ to keep the contrast explicit throughout the essay.
常见的错误是只分别描述两种理论而不进行直接比较。使用比较性短语，如“现实主义者认为……而自由主义者反驳说……”，在整篇文章中保持对比明确。
Published by TutorHao | Politics Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导