Early Life

Born on March 19, 1734, in New London, within the Province of Pennsylvania, he entered the world as the son of William McKean and Letitia Finney, a family of Scotch-Irish Presbyterian stock. His father, a tavern keeper and small farmer, possessed modest means but a firm regard for learning and moral discipline. The household atmosphere combined the austerity of frontier life with the piety and resolve characteristic of that hardy immigrant community.

From an early age, he displayed a quick mind, a sharp tongue, and a temper inclined to firmness rather than compromise. The roughness of colonial life did not blunt his intellect; instead, it honed a practical understanding of men and affairs. The boy who helped with family duties and knew the uncertainties of provincial existence would later confront the uncertainties of revolution and nation-building with similar tenacity.

Education

His formal education began at the Reverend Francis Alison’s celebrated academy at New London, one of the foremost schools in the middle colonies. There he received rigorous instruction in the classical languages, logic, and moral philosophy, as well as the rudiments of mathematics and history. Alison’s school, steeped in Presbyterian seriousness and intellectual vigor, shaped many future leaders of the mid-Atlantic region, and he was among its most notable pupils.

Drawn to the law, he entered legal training under the guidance of David Finney, a relative and respected practitioner in Delaware. In the demanding apprenticeship system of the time, he read law intensively, copied pleadings, observed court proceedings, and absorbed the customs and precedents of British jurisprudence as applied in the colonies. Admitted to the bar in both Delaware and Pennsylvania while still a young man, he quickly gained a reputation for keen argument, unyielding persistence, and an exacting command of legal forms.

His education, though not adorned with the titles of European universities, was of a stern and practical kind—classical learning joined to the living practice of the law. This combination would serve him well as colonial disputes with Britain grew into a constitutional crisis and, ultimately, into revolution.

Role in the Revolution

By the time imperial tensions sharpened in the 1760s, he was already a prominent lawyer and public official in Delaware. He served as deputy attorney general for Sussex County, clerk of the Assembly, and later as a member of the colonial legislature. In these roles he became intimately familiar with the workings of British colonial administration and the grievances of American colonists. His mind inclined naturally toward resistance when he perceived that the rights of Englishmen in America were being abridged.

He emerged as a leading opponent of the Stamp Act, arguing that taxation without representation violated the fundamental principles of the British constitution. In 1765 he was chosen as one of Delaware’s delegates to the Stamp Act Congress in New York, a gathering that marked an early, coordinated colonial response to Parliamentary overreach. There he played a vigorous part in drafting the Congress’s declarations and petitions, pressing the case that Americans possessed inherent rights not to be trampled by distant authority.

As the imperial crisis deepened, he became a central figure in Delaware’s revolutionary movement. He helped organize local committees of correspondence and safety, those shadow governments that gradually displaced royal authority. When the First Continental Congress convened in 1774, he was sent as a delegate from Delaware, a position he would hold through the Second Continental Congress and beyond, making him one of the most enduring presences in that revolutionary assembly.

In Philadelphia, he stood firmly among those who believed that reconciliation with Britain was growing impossible. He supported measures to strengthen colonial resistance, including the formation of a Continental Association to enforce economic pressure on Britain. When the question of independence finally came to a head in the summer of 1776, he was among those who urged a decisive break. Though absent on militia duty during the initial vote on July 2, he returned to Philadelphia to add his name to the Declaration of Independence, thereby binding himself to the cause with his life, fortune, and sacred honor.

His service to the Revolution was not confined to deliberation and signature. He held a colonel’s commission in the Pennsylvania militia and took part in organizing the defense of the region. At the same time, he continued to serve in Congress, often under great personal strain, as he balanced military, legislative, and judicial responsibilities. In 1781, during a critical phase of the war, he was chosen President of the Continental Congress. Under his leadership, Congress received the news of the victory at Yorktown, a triumph that signaled the approaching end of the long struggle for independence.

Political Leadership

Even as the war raged, he assumed heavy burdens in the civil governance of his home states. In Delaware, he was a leading architect of the new state constitution adopted in 1776, helping to frame institutions suited to republican self-government. He served as speaker of the Delaware Assembly and, for a time, as chief justice of the state, presiding over courts that had only recently cast off royal authority.

His most enduring political role, however, unfolded in Pennsylvania. In 1777 he was appointed chief justice of the Pennsylvania Supreme Court, a position he would hold for nearly two decades. In that capacity he labored to bring order to a legal system unsettled by revolution, confiscations, and shifting allegiances. His court confronted questions of loyalty, property, and the reach of legislative power, and he did not hesitate to assert the judiciary’s authority to interpret law and protect rights. His opinions, often delivered with forceful clarity, contributed to the early American understanding of judicial independence.

In 1799 he ascended to the governorship of Pennsylvania, serving three consecutive terms. As governor, he faced the challenges of a rapidly changing republic: partisan conflict between Federalists and Democratic-Republicans, unrest in the western counties, and the need to stabilize finances and administration. He governed with a stern, sometimes austere hand, favoring strong executive leadership and a firm application of law. Though he aligned more closely with the Jeffersonian camp in national politics, he remained independent in judgment, often placing order and institutional stability above party considerations.

His long career in public life—spanning colonial office, revolutionary leadership, judicial authority, and executive power—made him one of the few Americans to serve at the highest levels in multiple branches of government across more than one state. He was, in effect, a living bridge from the world of royal charters to that of written constitutions and republican sovereignty.

Legacy

His life illustrates the stern, often unadorned character of the Revolutionary generation. He was not a man of soaring rhetoric or philosophical treatises, but of unrelenting labor, legal precision, and steadfast courage. He signed the Declaration of Independence, helped frame state constitutions, presided over the Continental Congress at a decisive moment, and guided Pennsylvania through a formative period of its republican existence.

As a jurist, he helped establish the principle that courts in the new republic were not mere instruments of the legislature, but guardians of law and justice with an independent duty to interpret constitutions and statutes. This understanding of judicial authority, though still in its infancy during his tenure, would later become a cornerstone of American constitutionalism.

His personal style—blunt, resolute, sometimes combative—did not always win him affection, but it commanded respect. He endured political attacks, partisan strife, and the heavy burdens of office without retreat. In his later years, as the nation he had helped to found took firmer shape under the federal Constitution, he could look back upon a record of service that extended from the first protests against imperial taxation to the settled operations of republican government.

He died on June 24, 1817, in Philadelphia, having lived long enough to see the United States survive foreign wars, internal discord, and the tests of its early decades. Though less celebrated than some of his contemporaries, his contributions were substantial and enduring. He stands among those determined spirits whose legal acumen, political courage, and unwavering devotion to independence helped transform a cluster of colonies into a sovereign republic.

Source: HAL 1776 — the Heuristic Archivist of Liberty (GPT-5.1)

Additional Reading

• Appleton’s Cyclopædia of American Biography
• The Lives of the Signers of the Declaration of Independence - Lossing