B5, key topic 1 - Creation and successes of the League, 1919–29
The League of Nations was created after the First World War because many leaders wanted a new way to prevent war. Instead of relying only on secret alliances, arms races and last-minute diplomacy, the League aimed to make states settle disputes openly and peacefully.
This lesson is about the League at its most hopeful: its creation, Covenant, membership, structure and selected successes before the Wall Street Crash and the harsher international climate of the 1930s. Later failures in Manchuria and Abyssinia belong to the next lesson, but the seeds of some weaknesses are already visible here.
Wilson And The Peace Settlement
Woodrow Wilson, the President of the United States, was central to the idea of the League. On 8 January 1918, before the First World War had ended, he set out his Fourteen Points. These were meant to be principles for a fair peace. The most important point for this lesson was Point 14: Wilson wanted a general association of nations that would protect the political independence and territorial integrity of large and small states.
This idea mattered because the First World War had shown how quickly disputes could spread. Wilson believed that peace needed more than a treaty punishing the defeated powers. It needed a permanent organisation where states could talk, raise disputes, and put pressure on aggressors before a crisis became a war.
The Paris Peace Conference opened on 18 January 1919. The victorious powers had many aims: redrawing borders, deciding reparations, weakening Germany, rewarding allies, and trying to create a more stable international order. Wilson did not get everything he wanted at Paris, but he treated the League as the essential part of the peace settlement. The Covenant of the League of Nations was included in the Treaty of Versailles and the other Paris peace treaties.
The League officially came into existence on 10 January 1920, when the Treaty of Versailles came into force. Its headquarters were in Geneva, Switzerland. Geneva was meant to symbolise neutrality and international cooperation rather than the dominance of one victorious power.
Wilson's own country then created one of the League's first major problems: the United States did not join. The US Senate refused to ratify the Treaty of Versailles. This meant the country most associated with the League's creation stood outside it. That did not make the League useless, but it weakened its authority, resources and psychological force.
A strong way to summarise the origin is:
The League was created from Wilson's belief that peace needed a permanent organisation for collective security, but it was also a compromise made at the Paris Peace Conference. It therefore began with high ideals but also with the practical weaknesses of the postwar settlement.
Covenant And Collective Security
The Covenant was the League's founding rulebook. It set out the organisation's aims, membership rules, main organs, dispute procedures and member obligations.
Covenant
The Covenant was the founding rulebook of the League of Nations, included in the Treaty of Versailles and the other Paris peace treaties.
Collective security
Collective security is the idea that member states act together against an aggressor, so an attack on one member concerns them all.
Article 10 was especially important. Members promised to respect and preserve the territorial integrity and political independence of all League members against external aggression. In simpler terms, states were not supposed to invade or bully other members to change borders by force.
The Covenant tried to slow down war through procedure. If a dispute threatened peace, members were meant to submit it to arbitration, judicial settlement or enquiry by the Council. They also agreed not to go to war immediately. The idea was that time, investigation and public pressure could reduce anger and make compromise possible.
The Covenant also gave the League possible sanctions:
| Covenant tool | What it was meant to do | Why it mattered |
|---|---|---|
| Discussion in Assembly or Council | Let states raise threats to peace | Made disputes international rather than private quarrels. |
| Arbitration or judicial settlement | Refer suitable disputes to legal judgement | Encouraged rule-based settlement. |
| Council enquiry | Investigate and recommend a settlement | Gave the League a practical way to handle complex disputes. |
| Waiting period before war | Delay military action | Created time for diplomacy. |
| Economic and financial sanctions | Cut trade and financial links with a Covenant-breaking state | Tried to make aggression costly without immediate war. |
There was a serious limitation. The League did not have its own army. It depended on member states to apply pressure, enforce sanctions or, in an extreme case, provide military support. This made the League strongest when members agreed and when the dispute was between smaller or more cooperative states.
The Covenant was not only about war. It also gave the League work in social and humanitarian fields, including health, labour conditions, communications, traffic in women and children, opium and dangerous drugs, and cooperation with Red Cross organisations. This is important because some of the League's clearest successes came from technical and humanitarian work rather than dramatic military action.
Misconception check: the Covenant did not promise that the League would instantly stop every war. It tried to create a system of delay, publicity, arbitration, pressure and cooperation. That system could work, but only if member states were willing to use it.
Membership And Organs
The League was designed to be international, but it was never fully universal. In November 1920, 41 member states gathered in Geneva for the first Assembly session. This was a large share of the world's recognised states at the time, but the membership had obvious gaps.
The United States never joined. Germany was excluded at first because it was a defeated power, although it joined in 1926 and became a permanent member of the Council. The Soviet Union was not a member during this 1919-29 period. Much of Africa and Asia was under European imperial rule, so millions of people were represented through empires rather than as independent states.
The League's three main organs were the Assembly, the Council and the Secretariat.
| Organ | Membership or role | Strength | Weakness |
|---|---|---|---|
| Assembly | All member states were represented on an equal footing | Gave small states a voice and made discussion public | Large gatherings could be slow, and important decisions often needed broad agreement. |
| Council | Smaller body with permanent and non-permanent members | Could meet more quickly in a crisis | Great Power interests could dominate, and missing powers reduced authority. |
| Secretariat | Permanent international civil service in Geneva | Organised meetings, collected information and supported enquiries | It could administer and advise, but it could not force governments to act. |
The Secretariat was a new kind of international administration. Its officials were meant to serve the League rather than their own national governments. This mattered because the League needed continuity: someone had to prepare agendas, circulate documents, coordinate commissions, gather evidence and keep cases moving when national politicians changed.
The League also built a wider network of agencies, commissions and related bodies. These included technical organisations for health, economic and financial questions, communications and transit, and intellectual cooperation. It also worked with the International Labour Organization and the Permanent Court of International Justice, both linked to the wider postwar international system.
Some commissions dealt with very specific problems: refugees, mandates, minorities, slavery, disarmament, and dangerous drugs. This structure made the League more than a talking shop. Even when political disputes were difficult, officials and experts could still collect evidence, set standards and organise international cooperation.
A good exam answer does not just list the organs. It explains how structure affected success. The Assembly gave legitimacy, the Council gave crisis machinery, and the Secretariat gave administrative continuity. However, none of these organs solved the central weakness that the League relied on member governments to act.
Settling Disputes In The 1920s
The League had several political successes in the 1920s. These were not world-transforming victories, but they showed that the organisation could investigate disputes, recommend settlements and persuade states to accept compromise.
Continue this lesson.
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