RTÉ Documentary 'Freedom Founder' Traces Antrim Roots of Last Signatory of US Declaration of Independence

RTÉ Documentary Uncovers Antrim Roots of the Last Man to Sign the Declaration of Independence

A new RTÉ documentary has shed fresh light on one of the most overlooked connections between Ireland and the founding of the United States, tracing the Antrim roots of Thomas McKean — the American-born son of Ulster emigrants who was the last individual to sign the Declaration of Independence and who played a pivotal role in the American Revolution as a confidant of George Washington and a key figure in the new republic's early governance.

Background

The story of the Irish contribution to the American Revolution is one that has been told in broad strokes — the Ulster-Scots who formed the backbone of Washington's Continental Army, the Catholic Irish who fought for independence from British rule in a new land, the emigrants who brought with them a tradition of resistance to colonial authority that found fertile ground in the revolutionary politics of the 1770s. But the specific stories of individual Irish-descended figures in the founding of the United States are less well known, and Thomas McKean is among the most significant of those whose Irish connections have been insufficiently explored.

McKean was born in Chester County, Pennsylvania, in 1734, the son of William McKean, who had emigrated from Ballymoney in County Antrim, and Letitia Finney, whose family had roots in County Donegal. He trained as a lawyer and became one of the most prominent legal and political figures in colonial Pennsylvania and Delaware, serving in the Continental Congress and playing a central role in the debates and negotiations that led to the Declaration of Independence in 1776.

His status as the last signatory of the Declaration is a matter of historical record, though the precise circumstances of his late signing have been the subject of some scholarly debate. What is not in dispute is that McKean was a committed and courageous advocate for independence at a time when the outcome of the revolution was far from certain, and that his legal expertise and political connections were invaluable to the revolutionary cause.

Key Developments

The RTÉ documentary, titled Freedom Founder: Thomas McKean and the American Revolution, aired on RTÉ One on the evening of 29 June. The film was produced with the cooperation of McKean's direct descendant, former United States Ambassador David McKean, who serves as the documentary's guide and narrator as he traces his family's journey from Antrim and Donegal to the heart of the American Revolution.

The documentary follows David McKean as he visits the townlands in County Antrim from which his ancestor's father emigrated, exploring the social and economic conditions that drove the Ulster-Scots emigration of the eighteenth century. It then traces the family's journey to Pennsylvania and Delaware, examining the world in which Thomas McKean grew up and the influences that shaped his political convictions.

The film's centrepiece is its examination of McKean's role in the Continental Congress and his relationship with George Washington, whom he served as a trusted adviser and confidant. The documentary draws on previously unpublished correspondence between McKean and Washington to illuminate the personal dimension of their relationship and the role that McKean played in sustaining Washington's resolve during the darkest periods of the revolutionary war.

Why It Matters

The RTÉ documentary arrives at a moment when the relationship between Ireland and the United States is under particular scrutiny. The Irish government has been navigating a complex diplomatic environment in which the traditional warmth of the transatlantic relationship has been tested by shifts in American foreign policy and trade posture. In this context, a documentary that highlights the deep historical roots of the Irish-American connection — roots that go back to the very founding of the United States — carries a resonance that extends beyond its cultural interest.

The story of Thomas McKean is also a reminder that the Irish contribution to American history is not confined to the nineteenth-century famine emigration that dominates popular memory. The Ulster-Scots who emigrated to America in the eighteenth century were a significant force in the revolutionary period, and their descendants played important roles in the political, legal, and military life of the new republic. McKean's story is one of the most compelling examples of this contribution.

Local Impact

The documentary's exploration of McKean's Antrim roots will be of particular interest to communities in north Antrim, where the Ballymoney area has a strong tradition of Ulster-Scots heritage and a well-developed sense of its connections to the American revolutionary period. The Ulster-American Folk Park in Omagh, County Tyrone, which tells the story of the Ulster-Scots emigration to America, has already expressed interest in incorporating the McKean story into its interpretive programme. In Donegal, where the Finney family's roots are traced in the documentary, local heritage groups have welcomed the film as a contribution to the county's understanding of its diaspora connections.

What's Next

Freedom Founder: Thomas McKean and the American Revolution is available to watch on the RTÉ Player following its broadcast on RTÉ One. RTÉ has indicated that the documentary will be submitted to a number of international film festivals, and there is interest from American public broadcasting networks in acquiring the rights for broadcast in the United States. A companion exhibition, exploring the McKean family's Irish roots and their American legacy, is being developed in partnership with the Ulster-American Folk Park and is expected to open later in 2026.