The freedom of the seas

In Short

This seminal work is a legal and philosophical defense of the right of the Dutch to engage in trade within the East Indies. By arguing that the sea is, by its very nature, incapable of being owned or divided, the text effectively challenges the monopolies held by the Portuguese and Spanish crowns. It remains a cornerstone of international jurisprudence, having provided the essential framework for the modern concept of the "freedom of the seas," ensuring that the high seas remain an open, common resource for all nations to traverse and utilize.

The Story

The narrative begins with a clear, urgent purpose: to demonstrate that the Dutch have a legal, natural right to navigate the waters of the East Indies and to engage in commerce with the peoples residing there. The text asserts that this right is not merely a local privilege but a fundamental principle of the law of nations. By appealing to the nature of the universe as designed by a divine creator, the argument posits that human beings were meant to be a single, interconnected race. Because nature did not provide all necessary resources to every location, humanity was intended to bridge these gaps through mutual trade.

From this starting point, the focus shifts to the specific claims of the Portuguese, who sought to exclude all other nations from the East Indian trade. The text systematically dismantles these claims, moving through various legal justifications used by the Portuguese, such as titles based on religious authority or rights of discovery. It argues that no power—not even a papal donation—can turn the sea into private property. Because the sea is vast and cannot be fenced off or occupied in the way that land is cultivated and defined by boundaries, it remains fundamentally communal.

The argument progresses by examining the nature of property itself. While private individuals or nations might claim ownership over specific plots of land through labor and occupation, the sea defies this standard. It cannot be reduced to the possession of one party without causing injury to the rest of mankind. Thus, when any nation presumes to block the free passage of others, they are not protecting a legitimate interest but are, instead, acting with an intolerable and unholy greed. The text uses the voices of classical philosophers and legal authorities to reinforce this, suggesting that the desire to monopolize trade is a violation of the laws of nature.

The work culminates in a sharp critique of the King of Spain’s attempts to enforce these monopolies. By including royal letters as an appendix, the text exposes the high-handed nature of the effort to criminalize international commerce. The argument concludes that since the sea is common to all, any attempt to restrict it is an affront to justice. It remains an impassioned call to recognize that the common good of all humanity must take precedence over the narrow, exclusionary greed of any single sovereign power. The work leaves the reader with a clear mandate: that the sea must remain free, as it is a gift intended for the use of the entire world.

How It Unfolds

The foundation of the argument The text establishes that trade is a natural necessity, intended by the creator to foster friendship and mutual support between distant peoples. It puts forward the axiom that every nation possesses an inherent right to travel to and trade with every other nation.

The rebuttal of monopoly The narrative examines the Portuguese claims of exclusive dominion over the East Indies, systematically refuting them through legal and moral reasoning. It argues that indigenous peoples are the true masters of their own territory and that religious differences do not strip them of their property rights.

The nature of the sea The argument distinguishes between land, which can be occupied and owned, and the sea, which is essentially infinite and communal. It asserts that the sea is like the air—incapable of being held or restricted—and must remain open to all for navigation and fishing.

The failure of prescription The text addresses the legal concept of prescription, arguing that one cannot gain a right to own the sea through the mere passage of time. It maintains that since an exclusive claim to the sea is inherently unjust, no amount of custom or historical practice can ever make such a claim valid.

The appeal to humanity The work concludes by framing the Dutch cause as one aligned with the benefit of the entire human race. It warns that those who violate these natural laws for the sake of private gain will find neither divine favor nor earthly peace.

The People

The text is driven by the ideas of several key figures, most notably the author himself, who serves as the voice of reason and legal precision. He acts as an advocate for the Dutch people, whose desire for trade is presented as both a practical necessity and a natural right. Standing in the way of this, however, are the Portuguese and Spanish authorities, represented by the King of Spain and his viceroys. These rulers are depicted as embodiments of "shameless" ambition, using empty titles and the pretense of "civilizing" the East Indians to justify their exclusionary practices.

Also central are the classical and legal authorities cited throughout: thinkers like Cicero, Ulpian, and Thucydides, alongside theologians and jurists. They provide the moral and intellectual scaffolding for the argument, grounding the author's claims in centuries of Western tradition. The East Indian people, while not speaking for themselves here, are defined as intelligent and sovereign, acting as the counter-point to the "greedy" European powers. By the end, the figures representing the monopoly are diminished, revealed as authors of a "ridiculous" and unholy policy, while the Dutch and the broader international community are positioned as defenders of a necessary, natural liberty.

In Its Own Voice

For religious belief, as Thomas Aquinas rightly observes, does not do away with either natural or human law from which sovereignty is derived.

The author clarifies that the faith of the East Indian people does not grant foreign powers the right to seize their lands or control their trade.

It is clear therefore to every one that he who prevents another from navigating the sea has no support in law.

This sentence summarizes the heart of the argument, asserting that the act of blocking trade is fundamentally illegal under the law of nations.

The lords of the earth claim for themselves the ocean, but the ocean is not a gift from God to be snatched away by men.

This reflects the author’s insistence that the sea remains a common resource that no earthly power has the authority to monopolize.

What It's Really About

At its core, this work is about the tension between human greed and the natural order. It questions whether property rights, which make sense on land, can ever be applied to a medium as fluid and infinite as the ocean. The work posits that there are certain things in the world that are "common to all," and that by attempting to own the unownable, nations sow the seeds of discord and injustice. It explores the moral obligation to facilitate trade as a means of connecting humanity, suggesting that any attempt to hoard resources at the expense of others is a violation of both natural law and the divine will.

Why Read It Today

Readers with an interest in the history of international law, economics, or the evolution of global trade will find this work essential. It is a foundational text that provides the intellectual lineage for the modern concept of international waters. However, it is not a light read. The text is dense with 17th-century legal terminology and relies heavily on citations from Roman law, the Bible, and classical Greek and Roman philosophers. A reader must be prepared for a scholarly, academic tone that demands close attention.

The book is also a product of its time. While the author argues against the "barbarism" of the Portuguese, he operates within a Eurocentric worldview that, while ahead of its contemporaries in its insistence on liberty, still reflects the complex, often fraught, power dynamics of the Renaissance era. Despite these challenges, the feeling of reading it is one of witnessing a profound shift in human thought. It is the moment the world began to move toward a more interconnected and regulated global order. What stays with the reader is the author's unwavering conviction that some things are simply too vast and too vital to belong to any one person or nation.