How Pennsylvania Became the Second State to Ratify the U.S. Constitution on December 12, 1787
When delegates concluded the Constitutional Convention in September 1787, each state faced the monumental decision of whether to adopt the new Constitution. On December 12, 1787, Pennsylvania became the second state—and the first large state—to ratify the Constitution, providing critical momentum for the creation of a stronger national government.
Pennsylvania’s swift ratification was not inevitable. The debate revealed deep divisions, passionate advocacy, and profound questions about liberty, representation, and the balance of federal and state authority—questions that remain central to American civic life today.
A State Already at the Center of the Nation’s Founding
Philadelphia had hosted the Continental Congress, the signing of the Declaration of Independence, and the Constitutional Convention. Many of the nation’s leading thinkers lived or worked in Pennsylvania, including:
- Benjamin Franklin
- Robert Morris
- Gouverneur Morris
- James Wilson
These leaders helped draft the Constitution and became strong advocates for its ratification. Their voices carried considerable influence across the state.
Even so, Pennsylvania was politically divided. The state legislature was split between Federalists, who supported ratification, and Anti-Federalists, who feared centralized power and the absence of a bill of rights.
The Ratification Convention: A Contentious Beginning
To move quickly on ratification, the Federalist majority in the Pennsylvania Assembly called a state ratifying convention for November 1787. This urgency sparked intense opposition.
According to historical accounts preserved by the Library of Congress and the National Archives, Anti-Federalists protested the rapid timeline, arguing that citizens needed more time to read and understand the new Constitution. In one dramatic incident, Anti-Federalist legislators attempted to prevent the Assembly from reaching a quorum, forcing Federalists to escort absent members to the chamber to begin the process.
By the time the convention opened in Philadelphia, tensions were high—but so was public interest. Crowds packed the galleries to hear debates led by prominent Federalist figures, including James Wilson, one of the Constitution’s primary drafters.
Federalist Arguments: Unity, Stability, and National Strength
Federalists argued that the Articles of Confederation had proven unworkable. The national government lacked authority to raise revenue, regulate commerce, or respond effectively to domestic or foreign challenges.
Wilson famously described the Constitution as a balanced system that protected both liberty and effective governance. He spoke of separation of powers, checks and balances, and the promise of a government “deriving its power from the people.”
Supporters also emphasized that the Constitution could be amended, offering reassurance that future concerns—such as individual rights—could be addressed through a democratic process.
Anti-Federalist Arguments: Fear of Centralized Power
Anti-Federalists raised concerns that continue to resonate today. Their objections included:
- Lack of a bill of rights
- Fear that a strong national government would overshadow states
- Concern about the size of congressional districts and representation
- Skepticism of federal taxation and standing armies
While ultimately outvoted, their advocacy shaped the nation: many of the Anti-Federalists’ concerns led directly to the drafting and adoption of the Bill of Rights just a few years later.
The Vote: December 12, 1787
After nearly three weeks of spirited debate, Pennsylvania’s convention voted with the result of 46 in favor, and 23 opposed.
With that vote, Pennsylvania became the second state to ratify the Constitution, and a crucial early supporter whose ratification signaled national momentum. Celebrations broke out across Philadelphia. Newspapers across the colonies published accounts of the debate, influencing discussions in other states that were still weighing their decisions.
Why Pennsylvania’s Ratification Still Matters
Pennsylvania’s ratification helped create the foundation of the American constitutional republic. The debates highlighted key themes that remain relevant today:
- Balancing individual rights and collective security
- Maintaining effective but accountable government
- Ensuring representation in a diverse nation
- Encouraging civil discussion in the face of disagreement
Pennsylvania’s December 12 decision offers a powerful example of civic participation, public reasoning, and the difficult work of building a nation.
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