The United Nations | Edexcel A-Level Politics
Updated: Sep 29
For Specification 9PL0
Edexcel A-Level Politics | Free Revision Notes
Estimated study time: 70–80 minutes
The United Nations is one of the most important institutions in Edexcel Global Politics. This The United Nations A-Level Politics revision page covers its origins in 1945, the UN Charter, and the roles and significance of the Security Council, General Assembly, Economic and Social Council and International Court of Justice. You will also consider their strengths and weaknesses. The topic builds on state sovereignty [The state: nation-state and national sovereignty] and prepares you to compare the UN with NATO [NATO] and later debates about global governance.
Learning Objectives 🎯
By the end of this revision page, you should be able to:
Explain the origins and development of the United Nations, including the significance of the 1945 Charter.
Explain the role and significance of the UN Security Council.
Explain the role and significance of the General Assembly, Economic and Social Council and International Court of Justice using the evidence available in the provided sources.
Analyse the main strengths and weaknesses of the UN's institutions.
Explain how Security Council membership, structure and the veto can restrict UN effectiveness.
Apply knowledge of the UN to examination questions about global governance, security and international organisations.
The specification explicitly requires the origins and development of the UN, its 1945 Charter, and the role, significance, strengths and weaknesses of these four institutions.
Revision Notes 📚
What is the United Nations?
The United Nations (UN) is an international organisation created in 1945 following the Second World War. The Edexcel glossary describes its purpose as promoting international co-operation and helping to prevent another conflict on the scale of the Second World War.
Its creation therefore reflected the belief that relations between sovereign states could be managed through international institutions rather than relying entirely on unilateral state action.
This creates an important tension within Global Politics. States remain sovereign, but they participate in institutions intended to encourage collective action. This links directly with globalisation, intervention and international law [Globalisation and the state system].
The origins and the 1945 Charter
The UN was formed immediately after the Second World War. Pearson mark schemes describe its original purposes as extending from peace and security to economic and social development, while material on the UN Charter also identifies a commitment to human rights.
The 1945 Charter provides the founding basis of the organisation. For revision purposes, remember the broad direction established in 1945:
maintaining international peace and security
promoting international co-operation
supporting economic and social development
developing an international commitment to human rights
The UN therefore developed as much more than a narrowly military organisation. This breadth becomes especially clear when it is compared with NATO [NATO], whose central purpose is security and defence.
Development of the UN
The significance of the UN has developed because it operates across several different areas of global governance.
Pearson material contrasts NATO's narrower security role with the UN's much wider collection of institutions and responsibilities. The UN includes political and judicial structures and also contributes to wider economic, social, human-rights and environmental governance.
This wider development matters because the Edexcel specification later asks you to assess how international institutions address contemporary issues involving:
conflict
poverty
human rights
the environment
The human-rights dimension is developed further in international law and judicial institutions [International human-rights law and institutions].
The UN Security Council
The Security Council is defined by Edexcel as the UN's most powerful body, with primary responsibility for maintaining international peace and security.
It is therefore the institution most directly associated with the UN's original peace and security role.
Structure and membership
The Security Council contains:
five permanent members, the United States, Russia, China, the United Kingdom and France
ten additional members elected on a rotating basis for two-year terms
The five permanent members possess the veto, giving them a particularly important position in Security Council decision-making.
This structure is significant because it deliberately gives some of the world's most powerful states a privileged role in collective security. Pearson's 2025 mark scheme emphasised that the permanent members are major economic and military powers. This can strengthen the Council because major powers participate directly, but it also creates questions about representation and legitimacy.
The Security Council's role
Its central role is the maintenance of international peace and security.
The sources identify several ways in which the Security Council can act:
passing Security Council resolutions
authorising the use of military force
supporting measures relating to international security
addressing issues such as nuclear proliferation and children in armed conflict
supporting international criminal tribunals
Pearson's 2025 mark scheme gives the authorisation of force following Iraq's invasion of Kuwait as an example of the Council exercising an important security role.
Strengths of the Security Council
1. It can take meaningful action
The Security Council is not simply a discussion forum. Pearson material identifies occasions when it has authorised the use of force, demonstrating its potential importance in collective security.
This gives it greater political significance than an institution that can only express an opinion.
2. Major powers are built into the system
The permanent membership means some of the world's most powerful states participate directly in decisions about global security.
This can make collective action more significant because powerful states possess the military, diplomatic and economic resources needed to implement decisions.
3. It has a broad security remit
Security Council resolutions can address more than conventional wars between states. Pearson material identifies issues including nuclear non-proliferation and children affected by armed conflict.
Weaknesses of the Security Council
1. The veto can prevent action
The specification specifically requires students to examine how the use of the veto can prevent the Security Council from effectively addressing contemporary global issues.
A permanent member can therefore prevent agreement even where other states support action.
2. Its membership and structure can restrict effectiveness
Edexcel explicitly identifies the Security Council's membership and structure as obstacles to effective global governance. A small group of permanent members possesses privileges not enjoyed by other states.
This can produce criticism that the Council reflects the interests and power relationships of a limited group of states.
3. Great-power disagreement can produce paralysis
The same feature that may strengthen the Security Council can also weaken it. Including major powers gives its decisions weight, but disagreements between those powers can stop collective action.
This tension is examined in more depth when studying membership, vetoes and reform [Effectiveness, reform and global civil society].
Overall judgement on the Security Council
The Security Council's greatest strength and greatest weakness come from the same source, its relationship with major powers.
Their participation gives the institution political and military significance, but the permanent membership system and veto can allow national interests to block collective action.
That tension is extremely useful in an essay because it allows you to move from knowledge to analysis rather than simply listing advantages and disadvantages.
The General Assembly
The General Assembly is explicitly named by the Edexcel specification as one of the UN institutions whose role, significance, strengths and weaknesses students must understand.
The provided Pearson assessment material gives one important example of its significance. The Universal Declaration of Human Rights was adopted by the UN General Assembly in 1948, demonstrating the Assembly's role in expressing international agreement around important global principles.
A source-supported strength
The wider UN has almost universal state participation, giving the organisation substantial international legitimacy. The General Assembly's association with the 1948 Universal Declaration of Human Rights illustrates how the UN can help establish shared international standards and principles.
This becomes especially relevant when studying human rights and sovereignty [Human rights and state sovereignty].
Limitation of the supplied evidence
The specification requires a fuller understanding of the General Assembly's formal role, significance, strengths and weaknesses than is explained in the accompanying examination materials provided here.
The Economic and Social Council
The Economic and Social Council is also specifically named in Edexcel specification section 2.1.1 as an institution whose role, significance, strengths and weaknesses students are required to study.
However, the specification and accompanying examination materials provided for this task do not give sufficient detail about its specific functions or evidence that would allow a reliable strengths-and-weaknesses analysis.
The importance of not filling this gap with unsupported information is particularly relevant when building precise 9PL0 revision notes.
The International Court of Justice
The International Court of Justice (ICJ) is defined by the Edexcel specification as the principal judicial organ of the United Nations.
Pearson's 2023 mark scheme explains that the ICJ:
was created as part of the United Nations
deals with disputes between states
is the primary judicial branch of the UN
has a wider international reach than the International Criminal Court because of its connection with UN membership
This distinguishes it from the International Criminal Court (ICC), which prosecutes individuals for crimes such as genocide, crimes against humanity and war crimes.
Strengths of the ICJ
1. It provides a judicial mechanism for disputes between states
The ICJ gives states a route through which disputes can be considered using international law rather than being resolved solely through political pressure or force.
This illustrates the broader UN objective of managing international relations through institutions.
2. It is integrated into the United Nations
Unlike the ICC, the ICJ was established with the UN and is one of its principal institutions.
Pearson's mark scheme therefore describes it as having a wider jurisdictional reach than the ICC.
3. It contributes to rules-based global politics
The ICJ reflects the idea that relationships between states can be influenced by international law.
This is important when later comparing realist scepticism about international organisations with liberal support for global governance [Liberalism].
Weaknesses and limitations
The wider specification makes clear that international courts face debates about:
the continuing importance of state sovereignty
whether international law is accepted
whether international law can be effectively enforced
controversies surrounding the performance of international courts
These issues mean that the existence of an international court does not automatically remove the power of sovereign states or guarantee compliance.
Comparing the four named UN bodies
Institution | Main source-supported role or significance | Key strength | Key weakness or limitation |
Security Council | Primary responsibility for peace and security | Can authorise significant collective action and involves major powers | Permanent membership, structure and veto can obstruct effective action |
General Assembly | Demonstrated significance through adoption of the Universal Declaration of Human Rights in 1948 | Can express widespread international agreement and contribute to global norms | Provided sources do not contain enough detail for a complete formal-powers analysis |
Economic and Social Council | Named by the specification as a required UN institution | Detailed source-supported evaluation is unavailable | Provided sources do not contain enough information for an accurate full evaluation |
International Court of Justice | Principal UN judicial organ dealing with disputes between states | Provides an international judicial mechanism within the UN | Effectiveness is affected by wider problems of sovereignty, acceptance and enforcement of international law |
Why the UN matters in Global Politics
The UN is useful because it brings together several central debates in the Edexcel course.
State sovereignty versus global governance
The existence of the UN shows that states have created institutions to manage shared problems. However, states remain central actors.
The Security Council veto demonstrates this particularly clearly. Powerful states have not simply surrendered their sovereignty to the UN. Instead, the structure of the organisation protects an important degree of major-power control.
Collective action versus national interest
The UN is intended to facilitate international co-operation, but its success often depends on whether individual states are prepared to agree.
This makes it an excellent case study when comparing realism and liberalism [Realism and liberalism compared].
Liberals can use the existence and development of the UN as evidence that states can create international organisations, rules and mechanisms for co-operation.
Realists can point to the Security Council veto, privileged permanent membership and continuing state sovereignty as evidence that powerful states remain dominant.
Hard power and institutional power
The Security Council also shows that international institutions are not limited to persuasion. It can be associated with the authorisation of military action, meaning the UN can sometimes facilitate the use of hard power.
At the same time, other UN institutions seek to influence behaviour through international rules, legal processes and widely accepted standards.
Assessing the UN's overall strengths
A strong overall case for the UN can be built around three ideas.
First, it provides permanent institutions through which states can co-operate rather than relying entirely on unilateral action.
Second, its activities cover several areas of global politics rather than security alone. Pearson assessment material emphasises that the UN has a much wider collection of aims and institutions than NATO.
Third, the Security Council and ICJ provide different mechanisms for managing international disputes, one primarily political and security-focused, the other judicial.
Assessing the UN's overall weaknesses
The most important criticism is that the UN remains dependent upon sovereign states.
The Security Council demonstrates this particularly clearly because its permanent members possess exceptional power through the veto.
There is therefore a persistent tension between:
global collective actionandthe continuing power and interests of individual states.
That tension should sit at the centre of analytical and evaluative answers about the UN.
Key Words 🔑
Key word | Student-friendly definition | How it may be used in an exam |
United Nations (UN) | International organisation created in 1945 following the Second World War to promote international co-operation and prevent another major conflict. | Use when explaining the origins, development and overall significance of global political governance. |
Security Council | The UN's most powerful body, with primary responsibility for maintaining international peace and security. | Use when analysing collective security, military action, the veto and the effectiveness of the UN. |
Veto | The power held by permanent Security Council members that can prevent a proposed Security Council decision from proceeding. | Use when explaining why the Security Council may be unable to act despite support from other states. |
International Court of Justice (ICJ) | The principal judicial organ of the United Nations, concerned with disputes between states. | Use when analysing international law, peaceful dispute resolution and the limits created by state sovereignty. |
State sovereignty | The principle that states possess ultimate authority over their own affairs. | Use to explain why international organisations and courts may struggle to compel states to act. |
Hints from the Examiner Reports 💡
Examiner hint: Stay tightly focused on the precise institution named in the question. In the 2025 examination, some candidates answering specifically about the Security Council discussed other parts of the UN instead, and that material was not creditworthy.
Examiner hint: Keep returning to the exact wording of the question. The 2025 report praised responses that repeatedly addressed the required ideas of role, significance and similarity rather than drifting into general knowledge about organisations.
Examiner hint: Knowledge alone is not enough in a 12-mark question. Strong responses developed the significance of their factual points through coherent chains of reasoning. Three well-developed analytical paragraphs can be more effective than a long list of undeveloped facts.
Examiner hint: When comparing institutions, compare them directly. The 2023 report found that stronger candidates identified a difference and then explained it, rather than writing a separate description of one institution followed by a separate description of the other.
Examiner hint: Accurate examples should support an argument rather than replace it. Examiner reports repeatedly identify strong examples as valuable when they are used to explain role, significance or effectiveness.
For a 30-mark answer, remember that strong knowledge and analysis must be accompanied by evaluation. Pearson reports emphasise substantiated arguments, judgements and a focused conclusion rather than leaving the judgement until a final sentence.
Common Mistakes ⚠️
Mistake: Treating the United Nations and Security Council as interchangeable
Why this is incorrect: The Security Council is one institution within the wider UN. The specification separately names the Security Council, General Assembly, Economic and Social Council and International Court of Justice.
The 2025 examiner report specifically noted that candidates discussing other UN institutions when a question asked only about the Security Council could not receive credit for that material.
How to improve: Underline the institution named in the question before planning your answer. Only bring in another body when it directly supports the required comparison or analysis.
Mistake: Describing the Security Council without analysing its significance
Why this is incorrect: Knowing that permanent members possess the veto is AO1 knowledge. Explaining that the veto can stop collective action and therefore weaken the UN's ability to resolve a crisis develops AO2 analysis.
How to improve: After each factual point, ask: So what does this mean for the UN's power, legitimacy or effectiveness?
Mistake: Assuming the veto is only a weakness
Why this is incorrect: The broader structure brings major powers into the collective-security system. Their participation can make Security Council decisions more politically significant.
How to improve: Look for tensions rather than one-sided lists. A useful judgement is that major-power involvement can strengthen the Council when states agree but weaken it when their interests conflict.
Mistake: Confusing the ICJ with the ICC
Why this is incorrect: The ICJ is the principal judicial organ of the UN and is concerned with disputes between states. The ICC is a separate court concerned with prosecution of individuals for specified international crimes.
Pearson's 2023 assessment materials explicitly distinguished their roles.
How to improve: Remember:
ICJ = states; ICC = individuals.
Mistake: Ignoring state sovereignty
Why this is incorrect: UN institutions operate within a global political system in which sovereign states remain extremely important. International organisations do not automatically replace state authority.
How to improve: When evaluating an international institution, consider whether its effectiveness depends upon states accepting, supporting or enforcing its decisions.
Exam-Style Questions ✍️
Question 1
Define the United Nations. (2 marks)
Answer:
The United Nations is an international organisation created in 1945 following the Second World War to promote international co-operation and help prevent another major conflict.
Mark scheme:
Award up to 2 marks for:
identification as an international organisation
creation in 1945 after the Second World War and an accurate explanation of its broad purpose
Question 2
Explain one reason why the 1945 creation of the United Nations was significant for global politics. (4 marks)
Indicative answer:
The UN created a permanent institutional framework through which states could co-operate after the Second World War. Its aims extended beyond simply preventing war to include economic and social development and human rights, meaning global problems could increasingly be addressed through international institutions.
Mark scheme:
1–2 marks: identifies a relevant feature of the UN's creation
3–4 marks: develops why this feature was significant for relations between states or global governance
Question 3
Explain two ways in which the Security Council may be considered significant in global politics. (6 marks)
Indicative content:
Responses may explain:
its primary responsibility for international peace and security
its ability to authorise military action
its role in passing resolutions on wider security concerns
the significance of including major military and economic powers among its permanent members
Award marks for accurate knowledge that is developed to explain significance, rather than simply listing features.
Question 4
A proposed Security Council response to an international crisis has support from most Council members. However, one permanent member uses its veto and the proposal does not proceed.
Analyse what this scenario demonstrates about one strength and one weakness of the Security Council. (8 marks)
Indicative answer:
A strength is that the Security Council brings powerful states into collective decision-making, meaning agreement can give international action substantial political and military significance.
A weakness is that the veto allows a permanent member to prevent action despite wider support. This means competing national interests can restrict the UN's ability to address a crisis effectively.
Mark scheme:
Credit:
accurate understanding of permanent membership and veto
analysis of major-power participation as a source of potential strength
analysis of the veto as a source of potential paralysis
clear connection to Security Council effectiveness
Question 5
Examine the strengths and weaknesses of the UN Security Council. (12 marks)
Indicative content:
A strong response could examine:
responsibility for peace and security
ability to authorise meaningful action
participation of major powers
Security Council resolutions on security issues
permanent membership and restricted structure
the veto
tensions between collective action and state interests
Mark scheme guidance:
The 12-mark Global Politics questions assess AO1 knowledge and understanding and AO2 analysis.
Higher-level responses should:
select accurate and relevant knowledge
develop several distinct points
explain why each strength or weakness matters
maintain a clear focus on the Security Council
create coherent chains of reasoning rather than a descriptive list
No separate overall judgement is required in the same way as a 30-mark evaluation question.
Question 6
Examine the differences between the role and significance of the Security Council and the International Court of Justice. (12 marks)
Indicative content:
Possible comparisons include:
the Security Council's primary responsibility for peace and security versus the ICJ's judicial role
political and security decision-making versus resolution of legal disputes between states
the Security Council's potential connection with military action versus the ICJ's use of international law
different ways in which state sovereignty can affect their effectiveness
Mark scheme guidance:
For the strongest answers:
identify a difference
explain both institutions in relation to that difference
analyse why the difference affects their role or significance
Avoid describing one institution for half the answer and then describing the other.
Question 7
Consider the following claim:
The main weakness of the United Nations is that sovereign states remain more powerful than international institutions.
Using your knowledge of the Security Council and International Court of Justice, analyse this claim. (12 marks)
Indicative content:
Support for the claim could include:
the Security Council veto allowing individual permanent members to block action
privileged permanent membership reflecting state power
the wider problem of acceptance and enforcement of international law
continuing tensions between international courts and state sovereignty
Challenges to the claim could include:
states have created and continue to participate in UN institutions
the Security Council has authorised collective action
the ICJ provides an established judicial mechanism between states
international institutions can influence how states respond to disputes
Credit answers that analyse the relationship between sovereignty and institutional power rather than merely stating that states are sovereign.
Question 8
Evaluate the view that the United Nations is effective because it encourages states to resolve global problems collectively rather than acting independently. (30 marks)
Indicative content:
Arguments supporting the view may include:
creation of a permanent international organisation after the Second World War
development of mechanisms for collective security
Security Council ability to authorise action
participation of major powers
judicial dispute resolution through the ICJ
wider development of international norms and institutions
Arguments challenging the view may include:
Security Council veto
restricted permanent membership
competing interests of powerful states
continuing state sovereignty
problems surrounding acceptance and enforcement of international law
Mark scheme guidance:
A strong 30-mark response should demonstrate:
AO1: accurate and carefully selected political knowledge
AO2: sustained analysis explaining relationships between institutions, sovereignty and effectiveness
AO3: balanced evaluation throughout the essay
For higher levels, do not write an argument section followed by a completely separate counter-argument section with no interaction. Compare the strength of competing explanations throughout and reach a focused, justified conclusion based on clear criteria for effectiveness.
A useful overall judgement could distinguish between the UN's ability to provide a framework for collective action and its ability to guarantee successful action. The organisation can give states mechanisms for co-operation, but its effectiveness remains heavily dependent on whether sovereign states, particularly major powers, are willing to use those mechanisms.
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