What international law is, how the UN was built after WWII, what it has achieved, where it falls short, and why some kind of global cooperation remains essential.
Young children can begin to understand international cooperation through the simple idea that everyone — including countries — needs rules and ways to work together. The core instincts to build are: when many people or groups share a space, rules help everyone get along; talking is better than fighting; some problems are too big for one person or one country to solve alone; people from other countries are like us. Children do not need the words 'international law' or 'United Nations'. But they can begin to see that the world is a shared place, that countries can cooperate, and that global problems need global solutions. At this age, the goal is to build openness to the wider world and trust that cooperation is possible. No materials are needed.
Countries are enemies of other countries.
Countries are not usually enemies. Most countries have friends, partners, and allies around the world — countries they trade with, help each other with, and learn from. Even countries that have had big disagreements often work together on some things. Seeing countries as always being enemies is a way of thinking that usually makes things worse.
There is no point in countries talking if they disagree.
Talking matters most when countries disagree. That is when violence becomes a risk, and talking is what keeps things peaceful. Even very deep disagreements can sometimes be reduced through careful, patient talking. Walking away from talking means either forcing solutions or accepting that problems get worse. Neither is as good as continuing to talk.
International law is the set of rules and agreements that govern relationships between countries. Unlike domestic law (made by a country's government for its own citizens), international law is mostly made by agreement between countries — through treaties, customary practice, and international institutions. It covers war, trade, human rights, the environment, the sea, outer space, diplomatic relations, and many other areas. The United Nations (UN) is the main international organisation for cooperation among countries. It was founded in 1945, in the aftermath of World War II — a war that had killed around 70 million people. The founders wanted to prevent such destruction from happening again. The UN Charter, signed by 51 countries in San Francisco in June 1945, set out the goals: 'to save succeeding generations from the scourge of war', to 'reaffirm faith in fundamental human rights', to 'establish conditions under which justice and respect for obligations' can be maintained, and to 'promote social progress and better standards of life'. The UN today has 193 member states — almost every country in the world. The UN's main organs include: the General Assembly (where every country has one vote); the Security Council (with five permanent members — US, UK, France, Russia, China — each with veto power, plus ten elected members); the Economic and Social Council; the Secretariat (the UN's administration, led by the Secretary-General); and the International Court of Justice (which settles legal disputes between states). Many 'specialised agencies' also form part of the UN system: WHO (health), UNESCO (education and culture), UNICEF (children), UNHCR (refugees), FAO (food and agriculture), ILO (labour), and many others.
Preventing and ending wars through negotiation and peacekeeping; providing humanitarian aid during crises; promoting human rights (through the Human Rights Council, treaty bodies, and special procedures); supporting economic development and reducing poverty; advancing public health globally; protecting refugees and displaced people; supporting decolonisation (which the UN did extensively from the 1940s-1970s); facilitating international law-making through treaties.
The Universal Declaration of Human Rights (1948); the elimination of smallpox (through WHO); substantial reductions in child mortality; successful decolonisation; many resolved conflicts; the Montreal Protocol saving the ozone layer; and decades of war avoided between major powers.
The veto power on the Security Council frequently blocks action; the UN has no army of its own and depends on member states; enforcement of international law is weak; wealthy countries often ignore rules they expect others to follow; the UN sometimes fails to act in crises (Rwanda 1994, Bosnia, and others); and the institution has shown limits in responding to 21st-century challenges (climate change, Russia's invasion of Ukraine, ongoing conflicts).
The UN is imperfect and sometimes seems ineffective in specific crises. But presenting it as simply useless misses its achievements and the counterfactual — a world without some form of international cooperation would be dramatically worse. Help students see both the value and the limits honestly.
The UN is a world government that tells countries what to do.
The UN is not a world government. It is a forum where countries cooperate voluntarily. It has no army of its own and cannot force countries to do anything. When the UN takes action — peacekeeping, aid, treaties — it is because member countries agree to it. Thinking of the UN as a world government misses how it actually works: slowly, by agreement, and only with the cooperation of its members.
Because the UN sometimes fails, it is useless.
The UN has significant failures — Rwanda, Syria, many ongoing conflicts — but it also has major achievements. Smallpox eradication, decolonisation, millions of refugees protected, hundreds of thousands of lives saved by peacekeeping, the Universal Declaration of Human Rights, and many successful mediated conflicts are all real accomplishments. The UN is imperfect but valuable — judging it only by failures misses most of what it does.
International law is not really law because there is no world police to enforce it.
International law is a different kind of law from domestic law, but it is still law. Countries follow it most of the time for several reasons: because they agreed to it; because they want other countries to follow rules too; because breaking it damages relationships and reputation; and because international courts and other mechanisms do sometimes work. International law has shaped the world enormously — from ending slavery to limiting chemical weapons to protecting refugees. Saying it 'isn't really law' ignores the significant effects it has actually had.
International law and the UN are complex subjects with genuine achievements, serious limits, and current crises. Understanding the main frameworks is essential for teaching at secondary level. The development of international law: modern international law emerged gradually. The Peace of Westphalia (1648) established the principle of state sovereignty. The Hague Conventions (1899, 1907) codified rules of war. The League of Nations (1920-1946) was the first attempt at a comprehensive international organisation, though it failed to prevent WWII. The UN Charter (1945), Genocide Convention (1948), Universal Declaration of Human Rights (1948), Geneva Conventions (1949), and later the ICCPR and ICESCR (1966) built a much more comprehensive post-war framework. International law now covers war, peace, trade, human rights, the environment, the sea, outer space, diplomatic relations, and much else. The 1945 settlement: the UN system emerged from the specific political settlement that ended WWII. The five permanent Security Council members were the Allied powers of 1945 — US, UK, USSR (now Russia), France, and China (originally Republic of China; PRC took the seat in 1971). Their veto power reflects the reality that the UN was built around the great powers, on the assumption that disputes among them would be managed diplomatically rather than through formal votes. This structure has been criticised as undemocratic (no African country has a permanent seat; Germany and Japan, now major powers, do not) and as an obstacle to action when any permanent member opposes it. Reform has been discussed for decades but has not happened — each permanent member must agree, and none has.
The law of armed conflict. The Geneva Conventions (1949) and their Additional Protocols (1977, 2005) protect civilians, prisoners of war, and the wounded. Key principles include distinction (between combatants and civilians), proportionality (in the use of force), and necessity. Gross violations are war crimes. IHL is violated repeatedly in modern conflicts, but it provides essential legal standards against which behaviour can be measured and prosecuted.
A parallel body focused on individuals' rights, whether in war or peace. The UDHR, ICCPR, ICESCR, CRC, CRPD, and many other instruments establish rights and states' obligations. Enforcement is weaker than in domestic law but includes UN treaty bodies, regional human rights courts (especially the European Court of Human Rights, the Inter-American Court), and the UN Human Rights Council. The International Criminal Court (ICC): established by the Rome Statute (1998, effective 2002), the ICC prosecutes individuals for genocide, crimes against humanity, war crimes, and (since 2017) the crime of aggression. It has indicted heads of state (Omar al-Bashir of Sudan, now Vladimir Putin for the Ukraine invasion) and convicted several defendants.
Major states (US, Russia, China, India) are not parties; enforcement depends on member states handing over suspects; cases take years. The ICC represents a major extension of international law into areas previously immune from accountability.
The Framework Convention on Climate Change (UNFCCC, 1992), Kyoto Protocol (1997), and Paris Agreement (2015) represent the main international framework for addressing climate change. The Paris Agreement involves national pledges that are not legally binding as such, representing a shift from top-down targets. Progress has been significant but insufficient; current pledges, even if met, would produce warming above 2°C.
The WTO (trade), Montreal Protocol (ozone layer, one of the clearest international law successes), UNCLOS (law of the sea), NPT (nuclear non-proliferation), Chemical Weapons Convention, Convention on Biological Diversity, and many others address specific global concerns. The crisis of multilateralism: international institutions have faced serious challenges in the 2010s and 2020s. US withdrawals under Trump from major agreements (Paris, JCPOA with Iran, UNESCO, WHO funding) damaged institutions. Russia's invasion of Ukraine has been a direct attack on the principle of territorial integrity. China's challenge to international institutions has grown. The Security Council has been unable to address major crises (Syria, Ukraine) because of Russian and Chinese vetoes. UN peacekeeping has been in retreat in several contexts.
At the same time, global challenges — climate, pandemics, biodiversity, AI governance — demand more international cooperation, not less. The gap between the need and the capacity is the central problem of contemporary international affairs. The future of global governance: major proposals include UN reform (Security Council expansion, voting changes), new institutions for emerging challenges (AI governance, climate finance, pandemic preparedness), and greater role for regional institutions (AU, EU, ASEAN). The direction of travel is not clear.
International law and the UN are often criticised as weak and ineffective.
The real limitations and the real achievements. The alternative to imperfect international cooperation is usually not better cooperation but none at all. The historical evidence strongly supports the value of imperfect institutions over pure inter-state anarchy.
International law is not really law because there is no world government to enforce it.
International law has different enforcement mechanisms from domestic law, but it is still law. Countries follow it most of the time for reasons that are real: reputation, reciprocity, domestic political pressure, and the consequences of open violation. Enforcement happens through international courts, sanctions, reputational costs, and — sometimes — military force. International law has shaped the world enormously: the reduction of inter-state war, the decolonisation process, the end of formal slavery, human rights progress, environmental protection. Treating it as 'not really law' misses what it has actually accomplished and also misunderstands how much domestic law also depends on voluntary compliance.
The UN is an undemocratic body that overrides national sovereignty.
The UN is not a world government. It is a forum for cooperation among sovereign states and has very limited direct authority over them. Security Council decisions are binding, but the veto means they rarely impose on great powers. General Assembly resolutions are not binding. Member states remain sovereign in nearly all domestic matters. The charge that the UN threatens sovereignty is typically used by nationalist politicians to resist international cooperation rather than reflecting how the UN actually operates. The real criticism — that the UN cannot effectively address abuses of sovereignty, such as Russia's invasion of Ukraine — is closer to the opposite problem.
Since wealthy countries often ignore international law, international law does not really constrain anyone.
Wealthy countries do violate international law, and this is a real problem. But the violations are the exceptions that prove the rule: they are newsworthy because most state behaviour follows international norms. States maintain extensive diplomatic relations, respect borders almost all the time, observe most treaty obligations, participate in international organisations, and generally operate within a framework of international rules. The picture of a lawless international order is not accurate. The more honest criticism is that enforcement is uneven — more against weaker states than stronger ones. This is a real problem worth addressing, not evidence that international law does not matter.
The UN is essentially a Western institution imposing Western values.
The UN was founded by the Allied powers of WWII but has since evolved through the decolonisation of most of its members. Most member states are from the Global South; much UN work happens in developing countries; and the Human Rights Declaration was drafted by representatives from multiple regions (including Eleanor Roosevelt, Charles Malik of Lebanon, P.C. Chang of China, and others). Non-Western states have played central roles in UN activities, leadership, and norm-setting. The claim that it is a 'Western' institution obscures this reality. Legitimate criticisms of specific UN practices should not be conflated with dismissal of the entire institution as Western.
Key texts accessible to students: the UN Charter (1945) itself is short, readable, and freely available. The Universal Declaration of Human Rights (1948) is essential. For general introductions: Mark Mazower, 'Governing the World' (2012) — excellent history of international institutions. Philippe Sands, 'East West Street' (2016) — narrative history of the origins of genocide and crimes against humanity law. Stephen Schlesinger, 'Act of Creation' (2003) — on the founding of the UN. For contemporary analysis: Anne-Marie Slaughter, 'A New World Order' (2004); Kenneth Roth on human rights (Human Rights Watch annual reports). On the ICC: David Bosco, 'Rough Justice' (2014). On the UN today: Richard Gowan and others writing for the International Crisis Group. Key organisations: UN main site (un.org); the International Court of Justice (icj-cij.org); the International Criminal Court (icc-cpi.int); Human Rights Watch (hrw.org); the Council on Foreign Relations' 'Global Governance' resources.
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