“When Britain first, at Heaven’s command, arose from out the azure main, this was the charter of the land.” So began the eighteenth-century patriotic conception immortalised in ‘Rule, Britannia!’by Thomas Arne (1710-1778). Its famous refrain was more than an injunction to possess warships. It identified the sea to national identity, political independence and the purposes of the state. Although the song was a poetic charter, not a constitutional document; it served as a rally call to Britain to never forget what being an island state meant. The words captured a strategic conviction that successive generations had learned, through experience, to understand: Britain’s circumstances required it to think and act through the maritime environment.
Today that charter has been deconstructed. Not the song, nor the geography of the British Isles, but the accumulated political, intellectual, institutional and social relationship through which Britain became a seapower. A construct of social, economic, financial and political endeavor. Britain was the last seapower state, that took centuries to construct but its disappearance has been far easier to mistake for an ordinary decline in naval strength.
For decades, the familiar complaints have become ritualistic: too few frigates and destroyers, unavailable submarines, inadequate ammunition, overstretched personnel, defective procurement and governments unwilling to pay for the defence they proclaim. Endless reviews promise to correct mounting and old failures while new technologies act like false prophets to promise that fewer ships and fewer people will somehow achieve more. Yet the same questions return, and the strategic position worsens.
There is a convenient explanation for all this: seablindness. Politicians do not understand the sea; civil servants do not understand seapower; the public has forgotten its maritime inheritance. The word is repeated so frequently that it has become an article of faith among naval commentators. But after decades of repetition, seablindness has become something rather more comfortable than an explanation. It has become an excuse, a burying of heads in the sand to hide failure by many.
Seablindness describes a condition. It does not explain how the condition was produced, why it persisted, or why those who continually invoke it have proved unable to correct it. To blame everyone outside the naval profession for failing to understand the sea is to excuse those who claim to understand it from examining their own failures. Above all, it evades the question of what happened to the institutions that once developed, preserved and communicated maritime strategic knowledge to government.
Perhaps the most extraordinary feature of contemporary naval debate is the persistence of a collective illusion. Many commentators, including some experienced Royal Navy veterans, continue to discuss Britain’s maritime future as though the historic relationship between the state, seapower and the Navy remains intact or recoverable. Their prescriptions assume that a diminished fleet can be repaired and the former system will resume functioning. More ships, better funding, smarter technology, improved doctrine: these may be necessary, but they are not an answer to the disappearance of the system that once gave naval power its national strategic meaning. It is national strategy that matters.
This is not a dismissal of professional service or operational expertise. It is a distinction between knowing how a navy works and understanding how a seapower state works. A distinguished naval career does not automatically confer mastery of the wider political, economic, cultural and institutional history of seapower. Nor does a scholar’s familiarity with naval battles necessarily amount to an understanding of naval warfare.
The delusion is not that Britain still possesses a Royal Navy. It is that possessing a Royal Navy means Britain still possesses the maritime strategic system that once sustained it. Too many are attempting to repair the surviving instrument of a system whose disappearance they have yet to acknowledge or unwilling to because to admit it, reveals the level of failure and change: making the mountain taller and steeper to climb than many imagine.
First is to acknowledge that Britain did not become a seapower merely because it was surrounded by oceans and seas. Geography supplied opportunities, vulnerabilities and constraints; it did not determine how political leaders would respond. Island circumstances made maritime choices especially compelling, whereas continental powers faced different combinations of requirements. But the choice to organise national life around the maritime environment remained a choice, repeatedly made, contested and renewed.
The Council of the Marine established under Henry VIII in 1546 marked an important stage in the development of the institutions that became the Admiralty. Across the centuries, maritime strategy came to connect naval force with commerce, finance, shipbuilding, ports, diplomacy, scientific knowledge, overseas relationships, law, communications and political independence. Civilian enterprise was not an accessory to a naval project. The navy was one instrument within a much larger national undertaking.
That system was neither seamless nor uncomplicated. The history of British seapower includes war, empire, trade, security and constitutional liberty. It also includes institutional rivalries, strategic errors and periods of acute vulnerability. Recognising these realities makes the history more useful, not less. The point is not that Britain once possessed an ideal maritime order, but that it deliberately developed a capacity to understand its circumstances and organise resources accordingly.
To remind, naval power concerns the development and employment of naval forces. Maritime strategy concerns the state’s relationship with the sea in its full political, economic, scientific, diplomatic and military dimensions. Seapower emerges from the interaction of those dimensions, not from a fleet list. A country can retain capable ships long after it has ceased to organise itself as a seapower.
Professor Andrew Lambert’s scholarship, notably Seapower States, has been particularly important in explaining that seapowers are consciously constructed political and cultural entities: not automatic gifts of geography and something to be maintained. Their existence cannot be guaranteed by the achievements of ancestors. A state cannot remain a seapower simply because previous generations understood the sea. Alongside Lambert, my own research into the deconstruction of the seapower state has sought to recover a distinction that remains insufficiently understood, even among those who profess expertise in naval affairs: a navy is not synonymous with seapower, and seapower is not synonymous with the possession of warships. Remarkably few contemporary commentators appear willing to follow that distinction through to its consequences for Britain today.
This is not a claim that scholarship should be immune from challenge, nor that maritime understanding belongs to a select few. Quite the opposite: the distinction matters because it must be taught, tested and understood well beyond the naval profession. But it cannot be recovered while those charged with explaining the sea continue to mistake its military instrument for the much larger strategic system that sustained it.
Second, the Admiralty’s significance is too often reduced to administering ships, sailors, expenditure and naval operations. These were essential responsibilities, but its larger historical function lay in connecting maritime experience to national decision-making. Through political leadership, civilian officials, professional expertise, historical records and relationships across government, it helped translate maritime circumstances into knowledge that ministers could use.
Much of that work was civilian. The permanent institution could outlast individual officers and ministers; it could preserve experience, connect maritime commerce and naval requirements to the wider state, and explain why the sea mattered before a crisis made the explanation urgent. Naval officers could concentrate on the demanding profession of naval warfare while others sustained the political and intellectual work of ensuring that government understood the wider purpose.
I have described this as the art of Admiralty: the continuing capacity to develop, preserve, challenge and communicate maritime strategic knowledge so that a state can think about strategy and act strategically. It was not a guarantee of wisdom, and the historical Admiralty was not beyond criticism. Its importance lay in the function it performed, not the sanctity of its name or its buildings.
In 1964 the independent Admiralty disappeared into the unified Ministry of Defence. The familiar justification was that modern defence required centralisation, cooperation and joint operations. But cooperation is not amalgamation, and administrative unity is not intellectual unity. The transfer of responsibilities on an organisation chart does not ensure that the authority, institutional memory, relationships and strategic judgement attached to those responsibilities survive.
The question is not whether the armed services should cooperate, they should, and they did so well without the MoD, it is whether the organisation of defence preserves the different kinds of knowledge required to determine national strategy. Britain’s maritime experience had once possessed an authoritative route to government. Its removal changed more than departmental administration; it changed who could speak, with what authority, and which questions were likely to reach political decision-makers.
The Royal Navy may have survived the Admiralty. That fact has encouraged a misleading assumption that the essential relationship between navy and state survived too. An institution may retain its operational instrument while losing the means through which its strategic purpose is understood. In that sense the survival of the Royal Navy has helped conceal the disappearance of something larger.
Third relates to the loss of Corbettian Strategic thought because the institutional story is only half the explanation. Britain has also progressively weakened the intellectual environments capable of recognising what was being lost. The disappearance of the Admiralty’s educational function coincided with a longer retreat from the historical study of national strategy and a narrowing of the places in which genuinely independent strategic thought could flourish.
Sir Julian Corbett (1854-1922) was not merely a naval theorist offering propositions about command of the sea or limited war. His larger achievement was a method: the sophisticated analysis of historical experience to understand how states connect political purposes, geography, commerce, finance, diplomacy and military force. He began with the circumstances and purposes of the nation, not with an inventory of ships. His first question was not simply how many, but for what?
John Knox Laughton (1830-1915) had helped establish the rigorous historical study of naval affairs; Corbett developed its value for strategic judgement. Both understood that the education of officers was insufficient if the state itself remained unable to understand maritime affairs. Civilian scholarship mattered precisely because it could examine assumptions that military institutions might prefer to leave undisturbed.
The subsequent marginalisation of this intellectual tradition was not inevitable. Corbett died in 1922 before he could finish his work, and his thinking was not only neglected but taken. Basil Liddell Hart (1895-1970) tinkered with Corbett’s ideas, claimed them as his own in the “British way in warfare”, and disparaged Corbett in the process. That happened early, in the interwar years, when Corbett most needed defenders. Sir Michael Howard (1922-2019) later completed the process, and with it the erosion of historical understanding of the sea’s influence upon the state. Interpretations of Britain’s strategic past increasingly emphasised continental commitments and the requirements of modern military organisation, and accounts of defence unification came to appear as inevitable progress rather than contested political and institutional choices.
Meanwhile, civilian universities, historical scholarship and independent forums for strategic study have faced pressures that make the patient reconstruction of historical experience increasingly difficult. Professional military education remains indispensable, but education delivered within a defence establishment can reproduce the assumptions or agendas of the organisation it serves. A curriculum may teach officers to operate expertly inside a system without equipping them to question why the system exists in its present form, invoking all sorts of issues related to how they view war around them, not least a battle between strategy and operational/tactical schools of thought, aka land think versus maritime think.
Invoking Corbett’s name is no substitute for thinking in a Corbettian manner. To be Corbettian is not simply to prefer one naval doctrine, celebrate maritime communications or reject decisive battle. It is to place military force within the whole of national strategy; to test theories against historical evidence; and to permit uncomfortable conclusions about the institutions that claim to possess strategic wisdom.1
Lambert has played a vital part in recovering Corbett’s intellectual stature. Yet, recovering the reputation of a great strategist is not the same as rebuilding the institutions capable of producing and sustaining that kind of thought. Britain have not simply lost the Admiralty’s capacity to educate the state. We have weakened the places, traditions and habits of inquiry capable of educating those who might perform that function today. I know, I tried to rebuild them at King’s College London to face stiff resistance even from quarters I least expected.
Vitally, a state that ceases to cultivate independent strategic thought should not be surprised when its institutions lose the capacity to think about strategy and then act strategically.
Fourth, this brings us back to seablindness and to an uncomfortable double failure. You cannot educate a state about something you have ceased adequately to understand yourself. Equally, you cannot educate those who do not wish to be educated. Neither failure is confined to politicians, officials or the public. Both can be found among the naval and military profession, its veterans, scholars and its most enthusiastic supporters.
Some who have spent careers defending the Royal Navy remain invested in explanations that assume the survival of the historical seapower state. They can recognise the loss of ships but resist evidence that the political and institutional settlement giving those ships their meaning has been dismantled because familiar expertise becomes a barrier to reconsideration.
The education of a seapower was never supposed to be a lecture delivered by an enlightened Navy to an ignorant nation. It was a continuing exchange between government, commerce, society, scholarship and the naval profession, in which all parties could be corrected by evidence and experience. Corbett himself faced professional resistance when his historical judgements challenged cherished naval assumptions. That tension was part of the value of independent scholarship, not an argument against it.
But the irony is profound: those who insist that politicians must learn to understand seapower may themselves be unwilling to reconsider what seapower means. Seablindness becomes a refuge because it locates ignorance elsewhere. The more frequently it is invoked without historical examination, the more effectively it conceals the failure of the supposed educators as well as the unwillingness of their audience.
This is why yet another campaign to raise naval awareness cannot, by itself, resolve the problem. The missing capacity is not simply publicity. It is an enduring system of strategic education and critical inquiry that reaches the state and remains capable of challenging the naval and military profession itself.
Fifth, we can turn to the events of 2026 made the distinction between possessing naval power and exercising seapower difficult to ignore. Before war began in February, roughly 125 vessels a day passed through the Strait of Hormuz, carrying about a fifth of global crude oil and LNG; by September, traffic had fallen dramatically amid attacks, blockade and insecurity. Around Bab el-Mandeb, the Houthis showed how an actor with nothing resembling a great-power navy could still alter shipping decisions, insurance costs, energy markets and the political calculations of governments. Neither needed to defeat a great fleet in battle to exert maritime influence.
Corbett would have recognised the principle. Command of the sea mattered because it enabled the use of maritime communications, or the denial of their use to an opponent, in pursuit of political purposes. The ships were means, not ends. Their strategic significance depended upon the effects they could produce. What command of the sea and sea control is, or even if it exists is a conversation elsewhere, but the point stands.
For Britain, the lesson arrived in the Channel. Russian warships and state-associated shipping became a recurring presence in Britain’s maritime approaches. A Russian frigate fired warning shots at a civilian yacht in the English Channel before escorting a shadow-fleet tanker through the waters that helped define the English state and gave birth to the modern navy. The Royal Navy shadowed and watched, and its sailors performed professionally. The question was what the circumstances requiring their efforts revealed about the state behind them. I set out the three chokepoints side by side in “2026: The Year Seapower Went Missing”.2
Yet much commentary returned to procurement, fleet numbers and the latest technological promises. Autonomous systems, drones and artificial intelligence may change naval operations profoundly. They cannot decide national purposes, recreate lost institutional knowledge or make the state understand why maritime communications matter. A so-called hybrid navy is not a substitute for a maritime strategy; nor does the promise of future capability excuse the absence of adequate means in the present.
The danger is that scarce, costly warships become assets too precious to risk for the protection of the maritime communications they exist to secure. Risk must always be judged carefully, but when preservation of the instrument displaces the purpose, the strategic reasoning has been inverted.
2026 did not create Britain’s maritime predicament. It exposed the accumulated consequences of decisions taken across generations. The Channel had not changed: Britain had. Behind it lurked something bigger that seapower and naval power were increasingly understood differently by nations and few towards the former.
Ultimately, all good things come to an end if they are not maintained. This is not a romantic claim that Britain’s earlier maritime national life should be restored in every detail. Its imperial purposes, technology and historical assumptions cannot be transplanted into the twenty-first century. Nor would simply reopening the Admiralty automatically recover the functions that once made it valuable. Although the author admits, it sounds better than ‘Ministry of Defence’, as words have meaning and can provide direction.
The requirement is more fundamental: to reconsider how Britain understands its circumstances, defines national purposes, organises defence and cultivates the strategic knowledge on which political judgement depends. That requires examining the assumptions of the Ministry of Defence as readily as those of the Royal Navy. No department, command or armed service should be beyond reconsideration. The loyalty must be to national strategy, not to the preservation of inherited organisational arrangements.
This is because a maritime state is not merely a nation with a navy or even the nation and the navy. It is a state that recognises the sea as central to its political, economic and strategic existence and organises civilian as well as military activity accordingly. That includes commerce, industry, science, infrastructure, law, education, diplomacy and naval force. Britain’s island geography makes that recognition especially urgent, but geography alone will not perform the work of government or education.
The answer therefore cannot be another patch to a system whose foundations have been removed. Rebuilding naval capability may be essential, but it must follow a wider reconsideration of the state, the institutions through which strategic knowledge reaches authority, and the educational culture capable of sustaining independent judgement. A new fleet or even wider defence without that reconstruction risks becoming a more expensive expression of the same intellectual failure. The United States although in different grounds, has people aware that America is walking a tight rope on the same matters and could easily head in direction with its vast naval power to one wholly disconnected from purpose and direction. However, other nations can learn from Britain and avoid the same mistakes to reduce the hole they may have dug for themselves.
The fuller history of how Britain’s national strategy, seapower and navy were progressively deconstructed forms a central case study in my forthcoming book on defence unification, strategic thought and the organisation of the state. It examines the choices, intellectual arguments and institutional changes through which a nation altered its capacity to understand and exercise power. The implications extend well beyond Britain and well beyond the sea. The American experience, in which the Navy Department was drawn into the same unification, sharpens the question and forms the other half of that case study.
As I mentioned in my PhD and forthcoming title: anyone who sets out to create something must accept that it will have to be maintained. Education in the “why” is vital throughout the life of any such endeavour, yet constructed things can always be torn down more easily than they were built. The old adage, that it is easier to destroy than to create, echoes through history, and the Royal Navy and Britain’s understanding of strategy fit it well. Both took centuries to build. Neither needed an enemy to unmake them, only a generation that stopped asking why they existed.
In conclusion, “Rule, Britannia!” told Britons what their country was for. The charter was never a gift of Heaven’s command; it was written, developed through hard experience, maintained at cost and, in our time, deconstructed. The task is not to restore the Royal Navy to a maritime state that no longer exists. It is to decide whether Britain is willing to reconstruct the foundations of a seapower at all or simply say, that the Royal Navy and that part of the pages of history can be assigned to exactly that, history.
