How to Fail at Geopolitical Change: Brexit

How to Fail at Geopolitical Change: Brexit

Introduction

Few political decisions in modern British history have been as consequential as Brexit.

On 23 June 2016, the United Kingdom held a referendum on its membership of the European Union. Leave won with 51.9% of the vote against 48.1% for Remain, on a turnout of 72.2%. The result began a political, constitutional, economic and diplomatic transformation that would take years to complete.

The United Kingdom formally left the European Union on 31 January 2020, followed by a transition period. At the end of that transition, on 31 December 2020, the UK left the EU Single Market and Customs Union.

Brexit was not necessarily a failure in the simple sense of "Britain left the EU." That was, in fact, the central objective of the Leave campaign.

The more interesting geopolitical question is:

«Did Britain successfully convert the political decision to leave the EU into the strategic advantages its supporters expected?»

This question makes Brexit an important case study in how difficult major geopolitical change can be.

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1. Brexit Was About More Than Economics

Brexit was fundamentally about sovereignty.

Supporters argued that Britain should regain greater control over:

- immigration policy

- laws and regulations

- trade policy

- borders

- taxation

- domestic decision-making

- international agreements

The argument was that membership of the EU limited Britain's ability to make independent decisions.

For supporters, Brexit represented a return to national political autonomy.

For opponents, however, the same process represented a loss of economic integration, political influence and institutional access.

Therefore, Brexit contained a fundamental strategic trade-off:

More national autonomy versus deeper integration with Europe's largest political and economic bloc.

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2. The First Problem: Winning a Referendum Is Easier Than Designing a Strategy

The referendum answered one question:

Should the UK leave the European Union?

But it did not provide detailed answers to the much harder questions that followed.

For example:

- What type of relationship should Britain have with Europe?

- Should Britain remain closely aligned with the Single Market?

- Should it remain in the Customs Union?

- How should Northern Ireland be treated?

- What would happen to trade?

- What would happen to freedom of movement?

- How would financial services be affected?

- What would Britain's global trade strategy look like?

The referendum created a political mandate, but the detailed geopolitical strategy still had to be constructed.

This distinction became one of the central difficulties of Brexit.

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3. The "Leave" Coalition Was Not One Single Vision

Another challenge was that Brexit supporters did not necessarily agree about what Brexit should mean.

Some wanted a relatively close economic relationship with the EU.

Others wanted a much more distant relationship.

Some emphasized economic opportunities.

Others emphasized sovereignty and immigration control.

Others saw Brexit as an opportunity for Britain to pursue a global trading strategy.

Therefore, after the referendum, Britain had to answer a question that had not been fully settled during the campaign:

What exactly does Brexit mean?

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4. The Theresa May Problem

Theresa May became Prime Minister shortly after the referendum.

Her government attempted to negotiate Britain's withdrawal while balancing several competing interests.

The Withdrawal Agreement eventually negotiated with the EU included arrangements covering issues such as citizens' rights, the financial settlement and Northern Ireland.

However, the agreement faced strong opposition inside Parliament.

The political conflict became so severe that Britain repeatedly struggled to determine what form of Brexit Parliament would actually support.

The Commons Library records that Article 50 was triggered on 29 March 2017, beginning the formal withdrawal process.

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5. The Northern Ireland Problem

Perhaps the most difficult geopolitical issue was Northern Ireland.

Northern Ireland shares a land border with the Republic of Ireland, which remained an EU member.

Brexit therefore created a complicated problem:

Britain wanted to leave the EU's regulatory and customs structures, while the peace settlement on the island of Ireland depended heavily on avoiding a conventional hard border.

The issue became one of the most difficult parts of the negotiations.

The original 2018 Withdrawal Agreement contained a Northern Ireland Protocol and a controversial "backstop" concept.

This demonstrated an important lesson:

Geopolitical borders are not merely lines on maps. They are connected to economics, identity, history and security.

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6. Boris Johnson Changes the Strategy

Boris Johnson became Prime Minister in 2019 and pursued a different political strategy.

His government renegotiated the Withdrawal Agreement and secured a revised agreement with the EU in October 2019.

The revised agreement changed the arrangements concerning Northern Ireland and replaced the earlier backstop mechanism.

Johnson then won the December 2019 general election with a strong parliamentary majority.

His political message was straightforward:

"Get Brexit done."

Parliament subsequently approved the legislation necessary to implement the Withdrawal Agreement.

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7. Britain Finally Leaves

On 31 January 2020, the United Kingdom formally left the European Union.

But Brexit was not completely finished.

The UK entered a transition period during which many existing EU arrangements continued temporarily.

The decisive economic separation came at the end of 2020.

On 31 December 2020, the transition period ended and Britain left the EU Single Market and Customs Union.

This created a new relationship based on separate agreements rather than EU membership.

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8. The Trade-Off: Sovereignty vs Friction

Brexit created greater regulatory and political autonomy.

But autonomy can also produce friction.

Before Brexit, Britain was part of the EU's Single Market and Customs Union.

After Brexit, British businesses trading with the EU faced a different regulatory environment.

The UK-EU Trade and Cooperation Agreement established a new framework for the relationship.

The key geopolitical lesson is:

Independence does not eliminate costs; it changes where those costs appear.

A country may gain freedom to make its own rules while simultaneously creating new barriers with an important trading partner.

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9. The Geography of Brexit Did Not Change

Britain left the European Union.

But geography remained exactly the same.

The UK remained geographically close to Europe.

European countries remained Britain's major neighbours.

European supply chains remained interconnected.

British businesses continued to interact with European markets.

This produced a fundamental geopolitical reality:

Britain could leave the EU politically, but it could not leave Europe geographically.

That distinction is essential for understanding Brexit.

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10. The Global Britain Strategy

Brexit supporters argued that leaving the EU would allow Britain to pursue a more global strategy.

The concept of "Global Britain" emphasized stronger relationships beyond Europe.

Potential areas included:

- the United States

- Commonwealth countries

- Indo-Pacific partners

- emerging economies

- global financial markets

The strategy sought to transform Britain from a European power operating partly through EU institutions into a more independent global power.

This was an ambitious geopolitical vision.

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11. The Problem With "Global Britain"

The challenge was that global influence requires more than political ambition.

Countries need:

- economic scale

- diplomatic networks

- military capabilities

- technological strength

- investment

- trade relationships

- institutional influence

Britain already possessed many of these assets.

But the EU also provided a massive collective economic and diplomatic platform.

Leaving the EU therefore meant accepting a strategic trade-off:

Britain gained greater freedom of independent action but lost some influence that came from participating inside a larger bloc.

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12. Brexit and Britain's Diplomatic Position

Before Brexit, Britain possessed a distinctive geopolitical position.

It was simultaneously:

- a major European power

- a nuclear-armed state

- a permanent member of the UN Security Council

- a leading NATO member

- a major financial centre

- an EU member

Brexit removed one important element of that combination: EU membership.

Britain therefore had to redefine how it would use its remaining sources of power.

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13. The United States Question

The United States has traditionally been one of Britain's most important strategic partners.

The UK-US relationship remained important after Brexit.

However, Brexit also raised a broader question:

Could Britain strengthen its relationship with Washington enough to compensate for reduced influence within Europe?

The answer was never likely to be simple.

The United States values Britain as an ally, but Washington also has its own strategic priorities.

Britain therefore could not simply substitute an American relationship for its European relationship.

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14. Brexit and the European Union

One of the most important strategic realities was that Britain was negotiating with a bloc much larger than itself in population and economic scale.

The EU negotiated collectively.

Britain negotiated as an individual state.

This created an asymmetry.

Britain possessed significant economic, military and diplomatic power, but the EU possessed enormous collective market power.

The negotiations demonstrated that bargaining power is not determined only by military strength or historical influence. Market size matters too.

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15. The Economic Argument

Brexit's economic consequences remain one of the most debated aspects of the decision.

Supporters argued that Britain could:

- develop independent trade policy

- reduce unwanted regulation

- negotiate agreements globally

- increase domestic economic flexibility

- attract investment through independent policies

Critics argued that:

- trade with the EU became more complicated

- businesses faced additional administrative requirements

- some supply chains became less efficient

- barriers emerged where previously there had been deep integration

The important point is that Brexit created both opportunities and costs, and their size varies across sectors.

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16. Why Trade Deals Were Not a Magic Solution

A common strategic assumption was that Britain could compensate for reduced European integration by negotiating new global trade agreements.

But trade agreements take time.

They also cannot automatically recreate the economic advantages of proximity.

Selling goods to a nearby market of hundreds of millions of consumers is fundamentally different from negotiating access to distant markets.

Distance, logistics, regulations and supply chains matter.

Therefore:

A new trade agreement cannot automatically replace an existing economic ecosystem.

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17. The Financial Services Challenge

London is one of the world's major financial centres.

Brexit created questions about how financial firms would access European markets.

Some activities moved or expanded elsewhere in Europe.

At the same time, London retained significant global financial importance.

This demonstrates another important lesson:

Geopolitical change rarely produces complete winners and losers.

Some sectors may lose activity while others adapt successfully.

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18. Immigration: One of the Central Brexit Issues

Immigration was one of the most politically important subjects during the referendum.

Supporters of Brexit argued that Britain should regain control over immigration policy.

Leaving the EU ended the previous framework of EU free movement for Britain and allowed the UK to develop its own immigration system.

However, controlling immigration also creates economic trade-offs.

Many industries had relied on European workers.

Therefore, immigration policy became connected to:

- labour shortages

- wages

- business costs

- public services

- population growth

- political identity

Again, the geopolitical lesson is that one policy objective can create consequences in several other areas.

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19. Brexit and Scottish Politics

Brexit also intensified constitutional questions inside the United Kingdom.

Scotland voted by a clear majority to remain in the EU in 2016, while the UK as a whole voted to leave.

This created tension between the UK's overall referendum result and Scotland's voting pattern.

Brexit therefore became connected to the broader debate over Scottish independence.

This shows that geopolitical decisions can have internal geopolitical consequences.

A state may change its international position while simultaneously creating new pressures inside its own borders.

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20. Northern Ireland and the Windsor Framework

The Northern Ireland arrangements continued to evolve after Brexit.

In 2023, the UK and EU agreed the Windsor Framework, which modified aspects of the Northern Ireland Protocol.

The framework was intended to address practical difficulties concerning the movement of goods between Great Britain and Northern Ireland while maintaining the necessary protections for the EU Single Market.

This illustrates another lesson:

Major geopolitical agreements rarely remain completely static.

They require adjustment as real-world problems appear.

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21. Brexit as a Lesson in Negotiation

Brexit demonstrated that international negotiations are not simply about political slogans.

They involve:

- legal systems

- economic interests

- geography

- domestic politics

- international institutions

- historical commitments

- competing national interests

A country entering negotiations must therefore know not only what it wants, but also:

What can the other side realistically accept?

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22. The Danger of Oversimplifying Geopolitics

One of the major lessons of Brexit is the danger of treating complex international systems as simple political choices.

Statements such as:

"Leave and everything will improve."

or

"Leave and everything will collapse."

were both overly simplistic.

Reality was considerably more complicated.

Britain left the EU.

The British state continued functioning.

The economy continued.

Trade continued.

But the relationship with Europe became more complicated and required new institutional arrangements.

Geopolitical change is rarely binary.

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23. What Does "Failure" Actually Mean?

Calling Brexit a "failure" requires defining the objective.

If the objective was:

Leave the European Union

then Brexit succeeded.

If the objective was:

Regain complete policy independence

then Brexit substantially increased Britain's formal autonomy.

If the objective was:

Maintain frictionless trade with Europe while leaving EU structures

the outcome was much more difficult.

If the objective was:

Quickly replace European economic relationships with global alternatives

the process proved considerably more complicated than political rhetoric sometimes suggested.

Therefore, Brexit should not simply be labelled "success" or "failure."

It should be evaluated against specific strategic objectives.

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24. The Bigger Geopolitical Lesson

The deepest lesson from Brexit is not about Britain alone.

It is about geopolitical change itself.

When a country changes its relationship with a major international organization, it must consider five questions:

1. What are we leaving?

Understand the existing benefits and obligations.

2. What are we gaining?

Identify concrete strategic advantages rather than assuming independence automatically creates prosperity.

3. What will replace the old system?

Alternative institutions, agreements and partnerships must actually exist.

4. What are the unintended consequences?

Political decisions can affect borders, trade, investment, migration and domestic politics simultaneously.

5. Can the country adapt?

Geopolitical change is rarely a single event. It is a long process.

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25. Brexit and the Art of Strategic Patience

Brexit demonstrated that major geopolitical transformations can take years.

The referendum occurred in 2016.

Article 50 was triggered in 2017.

The UK formally left the EU in 2020.

The transition ended at the end of 2020.

The UK-EU relationship has continued evolving since then, including further discussions and agreements.

This is an important lesson for policymakers:

Political decisions can happen in a day; geopolitical consequences can last for decades.

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26. Was Brexit a Strategic Failure?

The answer depends on the criteria.

Brexit successfully achieved the central institutional objective of leaving the EU.

However, the process also revealed the enormous difficulty of replacing a deeply integrated political and economic system.

Britain gained greater formal independence in many areas, but it also accepted additional friction in its relationship with its largest neighbouring economic bloc.

The current UK-EU relationship is built around the Withdrawal Agreement, the Windsor Framework and the Trade and Cooperation Agreement. In 2025–26, both sides continued working on strengthening their relationship while maintaining those agreements.

Thus, Brexit is better understood not as a simple failure but as a case study in the complexity of geopolitical transformation.

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27. The Final Lesson: Do Not Confuse Departure With Strategy

The most important lesson from Brexit can be expressed in one sentence:

«Leaving an institution is not the same as having a strategy for what comes next.»

A successful geopolitical transformation requires more than rejecting the old system.

It requires building a viable new system.

Britain had to answer questions about trade, borders, immigration, security, diplomacy, Northern Ireland, regulation and international partnerships.

Some objectives were achieved.

Others involved significant trade-offs.

And some remain subjects of continuing political debate.

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Conclusion

Brexit represents one of the most significant examples of geopolitical change in contemporary Europe.

It demonstrates the power of democratic decision-making, but also the complexity of translating a referendum result into long-term national strategy.

Britain wanted greater sovereignty.

It achieved greater institutional independence.

But independence created new responsibilities.

The country had to negotiate new trade arrangements, establish new regulatory relationships, manage the Northern Ireland question, redefine its relationship with Europe and develop a broader global strategy.

The central lesson is therefore not simply "Brexit failed."

The deeper lesson is:

Geopolitical change is easy to announce but extremely difficult to execute.

A country can leave an institution in a single legal moment. Building the political, economic and diplomatic architecture that replaces the old relationship can take years.

Brexit therefore remains an important case study in strategic planning, negotiation, sovereignty, economic interdependence and the limits of political simplification.

In geopolitics, the hardest question is rarely "What do we want to leave?"

The harder question is: "What are we going to build after we leave?"