Which one of the following countries is not a UN member country?

1. The United Nations Charter & Structure (basic)

The United Nations (UN) was established in 1945 as a successor to the League of Nations, born out of the necessity to prevent the catastrophic scale of conflict seen during World War II. It wasn't an overnight achievement but a series of diplomatic milestones, beginning with the 1942 signing of the 'Declaration by United Nations' by 26 Allied nations. This culminated in the San Francisco Conference (April-May 1945), where the UN Charter was drafted. The Charter was signed on June 26, 1945, and the organization officially came into existence on October 24, 1945—a day now celebrated globally as UN Day Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Chapter 4, p.48.

The structure of the UN is built around six principal organs designed to handle different aspects of global governance. While the General Assembly acts as a deliberative body where all 193 member states have one vote each, the Security Council is the executive heart, featuring five permanent members (the P5) with veto power: the United States, Russia, the United Kingdom, France, and China Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Chapter 4, p.50. The other principal organs include the Economic and Social Council (ECOSOC), the Trusteeship Council, the International Court of Justice (ICJ), and the Secretariat, headed by the Secretary-General History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.252.

Feature	UN General Assembly (UNGA)	UN Security Council (UNSC)
Membership	All 193 member states.	15 members (5 Permanent, 10 Non-permanent).
Voting	One state, one vote.	P5 have 'Veto' power; decisions are binding.
Function	Deliberation, budget, and policy recommendations.	Maintenance of international peace and security.

It is important to note that membership has evolved over time. For instance, the seat originally held by the Republic of China (Taiwan) was transferred to the People's Republic of China in 1971 following UN General Assembly Resolution 2758. Currently, while most independent nations are members, entities like the Holy See (Vatican City) and Palestine hold Permanent Observer status rather than full membership Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Chapter 4, p.50. Beyond these core organs, the UN system extends into specialized agencies like WHO, UNESCO, and the IMF, which tackle specific socio-economic challenges globally History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.252.

Sources: Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Chapter 4: International Organisations, p.48; Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), Chapter 4: International Organisations, p.50; History, class XII (Tamilnadu state board 2024 ed.), The World after World War II, p.252

2. UN Membership Admission Process (basic)

To understand how the United Nations operates, we must first look at how a territory becomes a Member State. The UN is not a world government, but an association of sovereign states. Currently, there are 193 Member States. Admission is a two-step process: first, the Security Council must recommend the applicant (which requires at least 9 out of 15 votes and no veto from the P5), and second, the General Assembly must approve the admission by a two-thirds majority.

While the UN Charter states that membership is open to all "peace-loving states," the reality is often shaped by global politics. A prime example is the case of Taiwan (Republic of China). Taiwan was actually a founding member of the UN and held a permanent seat on the Security Council from 1945 until 1971. However, following General Assembly Resolution 2758 in 1971, the UN recognized the People’s Republic of China (PRC) as the only legitimate representative of China, effectively expelling Taiwan’s representatives. Today, Taiwan remains a non-member, while states like Greece, Portugal, and Australia are fully recognized members—with Australia specifically noted as a significant contributor to the UN budget Contemporary World Politics, Chapter 4, p. 50.

Not every entity in the UN has full membership status. Some are classified as Permanent Observers. This status is held by non-member states like the Holy See (Vatican City) and Palestine, allowing them to participate in sessions but not to vote in the General Assembly. When we discuss reforming the UN today, much of the debate centers on the criteria for membership in the Security Council, with suggestions that new members should be major economic powers, military powers, or substantial contributors to the UN budget Contemporary World Politics, Chapter 4, p. 53-54.

Sources: Contemporary World Politics, International Organisations, p.50; Contemporary World Politics, International Organisations, p.53; Contemporary World Politics, International Organisations, p.54

3. The UN Security Council and the P5 (basic)

The UN Security Council (UNSC) is often considered the most powerful organ of the United Nations, acting as its executive wing with the primary responsibility of maintaining international peace and security Contemporary World Politics, Chapter 4, p.50. While the General Assembly is a place for debate where every nation has one vote, the Security Council is where the real "teeth" of the UN reside. It consists of 15 members in total, split into two distinct categories: 5 Permanent Members (known as the P5) and 10 Non-permanent Members.

The P5—comprising the United States, Russia, the United Kingdom, France, and China—hold a privileged position that dates back to the end of the Second World War Contemporary World Politics, Chapter 4, p.50. Their most significant power is the Veto. Unlike a standard majority vote, if any one of these five members casts a negative vote on a substantive resolution, the resolution fails, even if all other members support it Contemporary World Politics, Chapter 4, p.60. This was intended to ensure that the UN would never take action against the vital interests of the world's major powers, thereby preventing a third World War.

Feature	Permanent Members (P5)	Non-Permanent Members
Number	5 (USA, Russia, UK, France, China)	10 (Elected by General Assembly)
Tenure	Permanent	2-year terms
Veto Power	Yes (One veto can stall any resolution)	No
Re-election	Not applicable	Cannot be re-elected immediately

It is important to note that the composition of the P5 has seen historical shifts. For instance, from 1945 to 1971, the seat for "China" was held by the Republic of China (Taiwan). However, following UN General Assembly Resolution 2758 in 1971, the People's Republic of China was recognized as the sole legitimate representative, and Taiwan was expelled from the UN. Today, many countries, including India, argue that the P5 structure is outdated and does not reflect the modern geopolitical reality, sparking ongoing debates about UN reform Contemporary World Politics, Chapter 4, p.54 & 58.

Sources: Contemporary World Politics, Chapter 4: International Organisations, p.50; Contemporary World Politics, Chapter 4: International Organisations, p.54; Contemporary World Politics, Chapter 4: International Organisations, p.58; Contemporary World Politics, Chapter 4: International Organisations, p.60

4. Non-Member Observer States (intermediate)

While the United Nations currently consists of 193 Member States, including founding members like India and Australia Contemporary World Politics, Chapter 4, p.50, 61, there is a special category known as Non-Member Observer States. This status is granted to entities that have been invited to participate in the work of the General Assembly but do not have the full rights of membership. This arrangement allows the UN to maintain diplomatic contact with states or entities that are not yet full members due to various geopolitical reasons or specific choices made by those entities. Currently, there are only two entities that hold this unique status: the Holy See (Vatican City) and the State of Palestine. The Holy See’s status is deeply rooted in its history as an independent sovereign entity, a status formally recognized through international agreements like the Lateran Treaty History (Tamilnadu State Board), Imperialism and its Onslaught, p.212. Palestine was upgraded to this status in 2012, moving from a 'non-member observer entity' to a 'non-member observer state.' It is important to distinguish these from Taiwan (Republic of China); although Taiwan was a founding member and held a permanent Security Council seat until 1971, it was replaced by the People's Republic of China under Resolution 2758 and currently holds no official status within the UN.

Feature	Member State	Non-Member Observer State
Voting Rights	Full voting rights in the General Assembly.	No right to vote on resolutions.
Participation	Full participation in all sessions and committees.	Can attend and speak in sessions, but restricted.
Candidacy	Can nominate candidates for Secretary-General.	Cannot nominate candidates for UN leadership.
Example	Portugal, India, Australia.	Holy See, Palestine.

These observers maintain Permanent Observer Missions at the UN Headquarters in New York. They can participate in most debates and have access to documentation, but their lack of a vote ensures that the final decision-making power remains strictly with the 193 sovereign Member States. This category is a vital diplomatic tool that allows the UN to remain 'the most indispensable international organisation' by keeping the door open to dialogue with entities that exist outside the standard membership framework Contemporary World Politics, Chapter 4, p.62.

Sources: Contemporary World Politics, International Organisations, p.50; Contemporary World Politics, International Organisations, p.61; Contemporary World Politics, International Organisations, p.62; History (Tamilnadu State Board), Imperialism and its Onslaught, p.212

5. International Recognition and Statehood (intermediate)

In the realm of international relations, being a "state" is more than just having a population and a government; it requires International Recognition. For a political entity to function on the global stage—signing treaties, joining trade blocs, or receiving diplomatic immunity—it generally needs the stamp of approval from the United Nations system. While the right to national self-determination suggests that every distinct nationality has a claim to independent statehood, the international community is often cautious. Granting statehood to every small group could lead to the creation of states that are not economically or politically viable Political Theory, Class XI, Nationalism, p.109. Thus, the UN acts as the ultimate arbiter of who is a legitimate member of the "Global Club."

Currently, the United Nations consists of 193 Member States. These include countries like Greece, Portugal, and Australia—the latter being a significant contributor to the UN budget Contemporary World Politics, Class XII, International Organisations, p.50. However, not every entity that functions like a state is a member. Some entities hold Permanent Observer Status. This status allows them to participate in sessions and maintain missions at the UN headquarters, but they do not have the right to vote on resolutions. The two most prominent examples are the Holy See (Vatican City) and Palestine.

The case of Taiwan is a unique example of how political recognition can shift. Despite being a founding member, the representatives of Taiwan were expelled in 1971 to make way for the People's Republic of China. This highlights that Statehood in the UN context is often a matter of diplomatic consensus rather than just physical existence. It is important to distinguish this international statehood from internal statehood; for instance, in India, the Parliament can redraw internal boundaries or create new states without those units having any independent international standing Indian Polity, M. Laxmikanth, Union and Its Territory, p.50.

Category	Rights/Status	Examples
Member States	Full voting rights, contribute to budget, eligible for all UN bodies.	Australia, India, Greece
Permanent Observers	Can attend meetings and speak, but cannot vote on resolutions.	Holy See, Palestine
Non-Recognized Entities	Function as states but lack official UN recognition/membership.	Taiwan

Sources: Political Theory, Class XI, Nationalism, p.109; Contemporary World Politics, Class XII, International Organisations, p.50; Indian Polity, M. Laxmikanth, Union and Its Territory, p.50

6. UN Resolution 2758 and the China Seat (exam-level)

To understand the current structure of the United Nations Security Council (UNSC), we must look at one of the most significant diplomatic shifts in UN history: the transfer of the "China Seat." In 1945, the Republic of China (ROC), led by the Kuomintang (GMD), was a founding member of the UN and one of the five permanent members of the Security Council. However, following the Chinese Civil War in 1949, the Communist Party established the People's Republic of China (PRC) on the mainland, while the ROC government fled to the island of Taiwan Themes in world history, Paths to Modernisation, p.174.

For over two decades, the ROC continued to represent "China" at the UN, despite governing only Taiwan. This created a geopolitical anomaly where the world’s most populous nation (the PRC) was excluded from the global body. This changed on October 25, 1971, with the adoption of UN General Assembly Resolution 2758. This resolution recognized the representatives of the PRC as "the only legitimate representatives of China to the United Nations" and expelled the representatives of Chiang Kai-shek from the seat they had occupied Contemporary World Politics, International Organisations, p.50.

Today, the UN consists of 193 member states. While nations like Australia and Portugal are recognized members, Taiwan remains a non-member and is not officially recognized as an independent state by the UN Contemporary World Politics, International Organisations, p.50. Because the UN views Taiwan as part of China, full diplomatic relations and embassies are not possible for Taiwan within the UN framework Themes in world history, Paths to Modernisation, p.175. Currently, only the Holy See (Vatican City) and Palestine maintain permanent observer status as non-member states.

Sources: Contemporary World Politics, Textbook in political science for Class XII (NCERT 2025 ed.), International Organisations, p.50; Themes in world history, History Class XI (NCERT 2025 ed.), Paths to Modernisation, p.174; Themes in world history, History Class XI (NCERT 2025 ed.), Paths to Modernisation, p.175

7. Solving the Original PYQ (exam-level)

This question bridges the gap between the theory of international recognition and the practical reality of UN membership. As you have learned in your modules on international organizations, while there are currently 193 member states, membership is not merely about functioning as a territory; it requires formal diplomatic recognition by the General Assembly. The core of this question lies in the historic shift of 1971. Although the Republic of China (Taiwan) was actually a founding member and a permanent Security Council seat holder, UN General Assembly Resolution 2758 transferred this recognition to the People's Republic of China. Consequently, Taiwan is the correct answer as it was expelled from the UN and is no longer recognized as a member state today.

When navigating UPSC questions of this nature, you must apply the process of elimination by identifying sovereign constants. Greece, Portugal, and Australia are all universally recognized sovereign states with undisputed membership; in fact, Contemporary World Politics (NCERT) highlights that Australia is a key contributor to the UN budget. The common trap here is assuming that a high level of global economic integration or historical involvement automatically equates to current UN status. Always distinguish between de facto independence and de jure UN recognition—this distinction is exactly what the UPSC is testing when they include entities with complex geopolitical statuses like Taiwan alongside established Western nations.