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On September 17, 1787, thirty-nine delegates gathered in the Assembly Room of the Pennsylvania State House, picked up a quill, and signed a document that would become the supreme law of the United States. The convention that produced it had run for nearly four months in sweltering summer heat, behind closed windows and locked doors, under a vow of strict secrecy. The result was the first written national constitution in the history of the world.
Constitution Day marks that signing every September 17th. For attorneys, it is worth more than a passing acknowledgment. The Constitutional Convention is not just a founding story. It is a legal story, full of procedural maneuvers, high-stakes compromises, and structural decisions whose consequences are still being litigated today. Here are ten things every attorney should know about how it happened.
1. They Were Not Supposed to Write a New Constitution
The delegates who arrived in Philadelphia in the summer of 1787 had been authorized by Congress to do one thing: revise the Articles of Confederation. The Articles, which had governed the young nation since 1781, were widely seen as inadequate. The federal government had no power to tax, no ability to regulate commerce between states, and no real enforcement mechanism for anything it decided. But the solution Congress had in mind was reform, not replacement.
The delegates decided otherwise almost immediately. Led by James Madison, who arrived in Philadelphia with a fully drafted alternative government plan already in hand, the convention quietly set aside its mandate and began writing an entirely new frame of government from scratch. What Congress had authorized as a cleanup exercise became a constitutional revolution. The delegates never formally disclosed this shift to the public while the convention was in session.
2. One State Refused to Show Up
Rhode Island, deeply suspicious of any move toward a stronger central government and protective of its own financial arrangements, was the only one of the thirteen states to refuse to send delegates to Philadelphia. The decision irritated even the normally restrained George Washington, who wrote in July 1787 that Rhode Island persevered in conduct that was impolitic, unjust, and one might add, without much impropriety, scandalous.
Rhode Island's absence meant the convention proceeded without it, and the Constitution was drafted and ratified without its participation. Rhode Island held out until 1790, more than a year after Washington had been inaugurated as the first president, finally ratifying the Constitution only after Congress threatened to treat it as a foreign nation for trade purposes.
3. The Whole Thing Was Conducted in Secret
Before substantive debate began, the delegates adopted a strict rule of secrecy: nothing spoken in the convention was to be printed or published without the consent of the members. There was no press gallery, no public observation, and no official record of the debates. To prevent voices from carrying to the street, windows were nailed shut in the Philadelphia summer heat, and heavy drapes were drawn.
The rationale, as Madison explained it, was practical: if delegates had committed themselves publicly to early positions, they would have felt bound by consistency to maintain them, making the compromises that produced the final document impossible. Critics have pointed to the secrecy rule as evidence of an undemocratic founding. Supporters argue it was precisely what allowed the delegates to change their minds without losing face. Both observations are probably correct.
4. The Main Record Was One Man's Private Notes, Held for 53 Years
Because of the secrecy rule, the primary source for what actually happened inside the convention is the notes James Madison took each day and transcribed each night into detailed records of the debates. Madison held those notes in private for his entire life, revising them over the decades, and refused multiple requests to release them, including a formal request from Secretary of State John Quincy Adams in 1818. He said he did not want them used in public debates then ongoing over the powers of the judiciary and the question of slavery.
Madison's notes were finally published in 1840, four years after his death, making him the last surviving witness to a founding document whose meaning had already been argued over for half a century. Every constitutional argument that appeals to original intent ultimately rests on a record that one man held, revised, and controlled until he died.
5. Many Delegates Never Showed Up, and Many Left Early
Of the 74 delegates chosen by their state legislatures to attend the convention, 19 never appeared at a single session. Of the 55 who did make it to Philadelphia, no more than 30 stayed for the full four months. New Hampshire's delegates did not arrive until late July, nearly two months into the proceedings, because the state legislature had initially failed to appropriate money for their travel expenses.
The convention operated under rules requiring the presence of delegates from at least seven states to conduct business. A quorum was not reached until May 25, eleven days after the scheduled start date, because spring rains had slowed travel and delayed arrivals across the board. The document that emerged from this process was produced by a shifting, incomplete, and frequently absent group of men who were making it up as they went.
6. The Great Compromise Saved the Convention from Collapse
By late June 1787, the convention was on the verge of dissolving entirely. The central dispute was representation: large states, led by Virginia, wanted seats in Congress apportioned by population, giving them more power. Small states, led by New Jersey, wanted equal representation regardless of size. Neither side would yield, and the deadlock had become existential.
The resolution, known as the Great Compromise or the Connecticut Compromise, was brokered by Roger Sherman and Oliver Ellsworth of Connecticut. It created the bicameral legislature that still exists today: proportional representation in the House, equal representation in the Senate. The compromise satisfied neither side entirely, which is arguably the definition of a successful negotiation. Without it, the convention almost certainly would have ended without producing a document at all.
7. The Three-Fifths Clause Was a Deliberate Political Calculation
One of the most consequential and morally troubling decisions made at the convention was how to count enslaved people for purposes of representation and taxation. Southern states wanted their enslaved populations counted fully, which would give them more seats in the House and more electoral votes. Northern states, some of whom opposed slavery, argued that people who could not vote and had no legal rights should not be counted for representation purposes at all.
The Three-Fifths Compromise resolved the standoff by counting three-fifths of each state's enslaved population in the total used to determine representation. The three-fifths ratio was not a statement about the humanity of enslaved people; it was a number derived from earlier congressional debates about taxation. But its effect was to embed slavery's political advantage into the constitutional structure, increasing pro-slavery strength in Congress, in the Electoral College, and by extension in the appointment of Supreme Court justices. The word "slave" does not appear anywhere in the original Constitution. The institution it protected is everywhere in it.
8. Three Delegates Refused to Sign
On the final day of the convention, September 17, 1787, three of the delegates still present refused to add their names to the document. Elbridge Gerry of Massachusetts and George Mason and Edmund Randolph of Virginia each declined to sign, for overlapping reasons: the absence of a Bill of Rights, concerns about the power of the executive, and objections to specific provisions they had argued against unsuccessfully during the summer.
Mason had actually proposed adding a Bill of Rights in the final days of the convention. The proposal was rejected by a unanimous vote of the state delegations, on the grounds that the Constitution's limited grant of powers to the federal government made such a list unnecessary. The three dissenters were not alone in their concerns; they were simply the ones willing to make their objections formal. The Bill of Rights that Mason had called for was ratified three years later, in 1791.
9. Benjamin Franklin's Last Act Was a Speech He Could Not Deliver
At 81, Benjamin Franklin was the oldest delegate at the convention and the most celebrated American alive. He had been largely silent during the summer's debates, his age and declining health limiting his participation, but on the final day he had prepared a speech. He was too weak to deliver it himself and asked fellow Pennsylvania delegate James Wilson to read it aloud on his behalf.
The speech was a masterpiece of pragmatic statesmanship. Franklin acknowledged that the Constitution was not perfect and that he himself did not entirely approve of it, but he noted that the older he got, the more he doubted his own judgment and the more he was inclined to pay attention to the judgment of others. He urged every delegate who still had objections to doubt a little of their own infallibility and sign. It was persuasive enough that several wavering delegates came around. As the signing concluded, Franklin remarked that all summer he had wondered whether the decorative gilded sun carved on Washington's presiding chair was rising or setting. Now at last, he said, he had the happiness to know that it was a rising sun.
10. The Document They Signed Is Still Being Argued Over
The Constitution that thirty-nine delegates signed on September 17, 1787 has been amended twenty-seven times and interpreted by the Supreme Court in thousands of decisions across more than two centuries. And yet the arguments that began inside that locked room in Philadelphia have never really ended.
The structural tensions the convention papered over with compromise, between large states and small, between federal power and state sovereignty, between the promise of equality and the reality of slavery, became the fault lines of American constitutional law. The Three-Fifths Clause was abolished by the Fourteenth Amendment. The Senate's equal representation has never changed. The debate over what the framers meant, and whether their intent should govern interpretations of a document written for a world that no longer exists, is as live in American courts today as it was in the decades after Madison's notes were finally published. Every attorney who has argued a constitutional question, or read a Supreme Court opinion, or wondered why the federal government is structured the way it is, is working in the long shadow of that summer.
Constitution Day is a good reminder that the document attorneys cite, argue over, and build cases around has a history as contested and contingent as any of the rights it protects. If you want to deepen your understanding of constitutional law in practice, Lawline's Constitutional Law CLE catalog covers everything from First Amendment doctrine to separation of powers to the evolving interpretation of the Bill of Rights. Browse the full collection and find your next course today.
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