The Thread Holds the King
Medieval Roots of Constitutional History
by Sherri L. Renner, JD | February 28, 2026
This is Article 3 in The Living Thread series.
In June 1215, a group of rebellious English barons forced a deeply unpopular king to do something unprecedented: they made him put his seal on a document that said that even the king was subject to the law.
King John had ruled through what medieval chroniclers called vis et voluntas — force and will. He taxed without consent, imprisoned without charge, and treated the law as his personal instrument. The barons who faced him at a Thames riverside meadow called Runnymede were not visionaries of democracy. They were angry noblemen fighting for their own privileges. And yet what they produced that June day — a document the world would come to call Magna Carta, the Great Charter — would echo across eight centuries, travel across an ocean, and live inside the very constitutional bones of the United States.
This is the story of how the thread of liberty wound its way through the Middle Ages, and why it mattered that ordinary people kept pulling it.
The King Who Made Enemies of Everyone
To understand why Magna Carta happened, you have to understand just how comprehensively King John had managed to alienate nearly every powerful faction in England simultaneously. He taxed his barons brutally to fund military campaigns in France that largely failed. He imprisoned people arbitrarily, seized lands without legal process, and demanded hostages from noble families as security for their loyalty.
By 1215, the barons had had enough. They rose in revolt, seized London, and presented John with a draft document of their demands that they called the “Articles of the Barons.” After ten days of tense negotiation, mediated in part by Archbishop Stephen Langton, John affixed his great seal to the final version on June 15, 1215. The document, which wouldn’t receive its now-famous name for another two years, contained 63 clauses covering everything from feudal taxation to fish weirs on the Thames.
Most of those 63 clauses are historical curiosities now. But two of them were different. Clauses 39 and 40 came to be called the “Golden Passages” because the language was especially powerful:
“No free man shall be seized or imprisoned, or stripped of his rights or possessions, or outlawed or exiled, or deprived of his standing in any way, nor will we proceed with force against him, or send others to do so, except by the lawful judgment of his equals or by the law of the land.”
“To no one will we sell, to no one deny or delay right or justice.”
In 35 Latin words, the idea that the government cannot simply do whatever it wants to you without legal process had been written down for the first time. The king was below the law. That sentence had never been enforceable before. Now it was on parchment.
A Symbol Bigger Than Its Origins
Now the story gets really compelling for due process history buffs and anyone interested in legal progress.
At its inception, the Magna Carta was almost entirely a document for the powerful. The barons negotiated it for themselves. The Church got protections. Merchants got some guarantees. But the vast majority of England’s population, including the peasants, the serfs, and the ordinary farming families who made up perhaps 90 percent of the country, were scarcely mentioned. The “free men” protected by Clause 39 were, in 13th-century England, a relatively narrow category. Serfs were not free men under the law.
John himself tried to have the document annulled almost immediately, appealing to Pope Innocent III, who obliged by declaring it “shameful, demeaning, illegal, and unjust.”
John died in 1216 before the resulting civil war could fully resolve. His nine-year-old son Henry III’s regents reissued a revised version of the charter, stripping it of some of its more radical provisions, partly to build political support for the new reign. The Magna Carta was reissued and revised multiple times over the following decades, each time embedding itself more deeply into English law.
Over the following four centuries, the Magna Carta expanded until it outgrew its origins. Lawyers and political thinkers began reading the Magna Carta not as the narrow feudal bargain of yesteryear, but as a statement of universal principle.
Sir Edward Coke, the great English jurist of the early 17th century, invoked it repeatedly against the claims of divine right monarchy. The “law of the land” language gradually evolved into what James Madison would eventually bring to the Fifth Amendment as “due process of law.” A direct line runs from that June meadow in 1215 to the protections Americans carry in their pockets today.
The Fifth Amendment’s guarantee that no person shall be deprived of life, liberty, or property without due process of law descends directly from Clause 39. The Sixth Amendment’s right to a speedy trial by jury, the Eighth Amendment’s prohibition on excessive fines, the constitutional protection of habeas corpus, the right not to be imprisoned without legal cause, all trace their lineage to this document. When the First Continental Congress met in 1774 to draft their Declaration of Rights against King George III, they printed Magna Carta on the title page of their proceedings. The founders didn’t just admire Magna Carta as a historical artifact. They treated it as a living authority.
The People Who Kept the Thread Alive
The barons got the credit. But the story of how the Magna Carta’s principles actually expanded to cover ordinary people requires looking at the ordinary people themselves.
In the summer of 1381, 166 years after Runnymede, a tax collector arrived in the Essex village of Fobbing to collect a third poll tax in four years. Poll taxes, which demanded the same payment from everyone regardless of wealth, were regarded as the definition of injustice by people already stretched thin by decades of war costs, labor laws that artificially suppressed their wages after the Black Death had dramatically reduced the workforce, and landlords attempting to reimpose serfdom on people who had begun to taste economic freedom.
The villagers of Fobbing threw the tax collector out. When the government sent soldiers, they threw them out too. Within weeks, tens of thousands of people from Essex and Kent, the farmers, artisans, parish priests, small traders, and urban workers, were marching on London in what would become known as the Peasants’ Revolt of 1381.
Their demands were radical for the time. Led by Wat Tyler and inspired by the preaching of a radical priest named John Ball, they called for the abolition of serfdom entirely, an end to the wage laws, redistribution of the Church’s enormous wealth, and a guarantee of equal freedom for all. Ball’s famous sermon at Blackheath put their philosophy in a single memorable line: “When Adam delved and Eve span, who then was the gentleman?” meaning that the divisions of feudal society were human inventions, not divine ones, and could be unmade just as they had been made.
King Richard II, just 14 years old, rode out to meet them. He agreed to their demands at a meeting at Mile End on June 14. The peasants, trusting the king’s word, largely dispersed. It was a trap. Richard’s promises were revoked almost immediately. Wat Tyler was killed at a subsequent meeting at Smithfield. John Ball was executed. The revolt was crushed.
And yet the World History Encyclopedia’s account of what followed is instructive: the poll tax was permanently abandoned. Restrictions on labor wages were no longer strictly enforced. The trend of serfs purchasing their freedom and becoming independent farmers continued and accelerated. No Parliament attempted another poll tax for six centuries, until Margaret Thatcher’s Community Charge in 1990 triggered riots, and was swiftly abandoned.
The Peasants’ Revolt failed in its immediate goals. Its leaders were executed. Its promises were revoked. But the world of mandatory serfdom, unchecked labor suppression, and taxation without any pretense of proportionality eventually collapsed anyway. The people who rose up in 1381 helped hasten the end of feudalism in England. They pulled the thread.
Law as Both Tool and Weapon — Again
It would be dishonest to tell this story without acknowledging its shadow.
The Magna Carta was a document with built-in contradictions. As mentioned above, its protections for “free men” excluded the majority of England’s people. It encoded feudal privileges even as it constrained the king. When ordinary people tried to invoke its language as a guarantee of their own rights, the powerful consistently argued that they had misread it and that the protections were for men of property, not for everyone.
The Statute of Laborers, passed after the Black Death in 1349, used the law to cap wages at pre-plague levels which essentially forced workers to subsidize the wealth of the landowner class at the precise moment when labor scarcity had given them real bargaining power. The poll taxes of the 1370s and 1380s used the law to shift the burden of war finance from the wealthy onto those who could least afford it. When the peasants of 1381 rose up invoking the Magna Carta’s principles of equal justice, the response was military suppression followed by the revocation of every promised reform.
This is the same pattern we traced in ancient Athens and Rome. Legal documents constrain arbitrary power at the top and simultaneously become tools for encoding the inequalities of their era. The gap between what a document says and who it actually protects has historically been closed not by the goodwill of those in power, but by the sustained pressure of those excluded from it.
The peasants of 1381 understood this. They didn’t trust parchment. They trusted pressure. They were right to.
What the Medieval Thread Gives Us
Three things stand out from this chapter of the story, and they track what we saw in ancient Athens and Rome.
Written law is transformative even when it falls short. Even though the Magna Carta protected only the barons, the act of writing down the principle that no one, not even the king, stands above the law created a standard that future generations could demand be applied to them. Words on parchment can be pointed to, argued from, expanded. Arbitrary power prefers vagueness.
Popular pressure is what makes written law expand. Time and again in this history, the boundary of who the law protects has moved outward only when those outside it made their exclusion costly enough that inclusion became the more practical choice. This is not a cynical observation, it is a clarifying one. It tells us exactly where change comes from.
Nothing is permanent without continued engagement. Every gain in this story required maintenance. Liberty, as the founders would later write into their own documents, must be perpetually defended not by armies alone, but by citizens who understand what they have and refuse to let it be taken.
Looking Ahead
In the next article, we move into the era of European revolution and touch upon the English Civil War, the Glorious Revolution, and the philosophical earthquake set off by thinkers like John Locke, whose ideas about natural rights and government by consent would travel directly into the minds of Thomas Jefferson, James Madison, and the other architects of the American founding.
The thread is getting longer. And it is getting stronger.
Sources and Further Reading
- Magna Carta — Encyclopædia Britannica
- Magna Carta, 1215 — Full Text — The National Archives (UK)
- The Contents of Magna Carta — UK Parliament
- How Did Magna Carta Influence the U.S. Constitution? — History.com
- Our Due Process Debt to Magna Carta — The Florida Bar Journal
- Writ of Habeas Corpus — Library of Congress, Magna Carta: Muse and Mentor
- Magna Carta and the U.S. Constitution — Institute for the Advancement of the American Legal System
- Peasants’ Revolt — World History Encyclopedia
- Peasants’ Revolt — Encyclopædia Britannica
- Wat Tyler and the Peasants’ Revolt — Historic UK
- Magna Carta | Wex — Legal Information Institute, Cornell Law School
- Habeas Corpus | Wex — Legal Information Institute, Cornell Law School
The Living Thread is a 12-part series tracing the history of freedom, law, and resistance from ancient Babylon to the American founding and beyond.
