Psychology can help us understand the conditions that allow our national ideals to become reality, said Duke University psychologist Sarah Gaither.
The Declaration at 250: Psychologist Sarah Gaither Reflects on Life, Liberty & Belonging
We invited Duke University faculty to reflect on the Declaration through the lens of their own discipline. Each contributor responded to a common prompt: “250 years later, how does your field help us understand, advance or challenge the ideals expressed in the Declaration of Independence?”
By Sarah Gaither, Nicholas J. and Theresa M. Leonardy Associate Professor Psychology & Neuroscience
The Declaration's preamble speaks in collective terms: “We hold these truths to be self-evident." Yet one of the central questions throughout American history has been who is included in that "we."
Two hundred fifty years after the Declaration of Independence, psychology offers a useful lens for understanding one of its most enduring aspirations: creating a society in which all people can pursue life, liberty, and happiness.
Psychology shows that humans naturally sort themselves and others into groups. These categories can help us make sense of the world, but they can also create boundaries between "us" and "them", ultimately distancing us from a truly inclusive “we.” At the same time, decades of research reveal something equally important: those boundaries are remarkably flexible.
My own work examines how people navigate multiple identities, including racial and cultural identities. Increasingly, many Americans do not fit neatly into a single category. Psychology finds that people thrive when they can embrace the full complexity of who they are rather than feel pressured to choose one identity over another. When individuals feel seen, valued and able to bring their whole selves into a community, they experience greater well-being, stronger social connections and a deeper sense of belonging.
This insight has implications for the ideals expressed in the Declaration. Liberty is not only the freedom to act; it is also the freedom to be recognized as who you are. The pursuit of happiness is not solely an individual endeavor; it is shaped by whether people feel accepted and connected to others. And life flourishes in communities where individuals feel they belong.
Psychology cannot determine our national ideals, but it can help us understand the conditions that allow those ideals to become reality. Two hundred fifty years later, one of the most important challenges remains expanding our definition of "we." The encouraging lesson from psychological science is that belonging is not a fixed resource that must be divided among groups. It can grow. When people are able to recognize complexity in themselves and others, the boundaries of who belongs can expand as well. Perhaps that is one way psychology helps advance the Declaration's enduring ideals: by showing how a larger and more inclusive "we" is actually possible.
About This Series
On July 4, 1776, representatives of thirteen American colonies ratified the Declaration of Independence, announcing both a political separation from Great Britain and a set of aspirations for a new nation. The document was written with two goals: declare independence and justify it. The Declaration begins with a sweeping philosophical statement that has echoed across generations:
“We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”
Two hundred and fifty years later, those words remain central to American civic life — even as their meaning and possibilities continue to be debated and reinterpreted. The nation’s semiquincentennial offers a moment to think more deeply about the American promise of ‘life, liberty and the pursuit of happiness’ and how those ideals have traveled across time.
These varied perspectives are a reminder that the Declaration is a living document — one that invites us to carry forward the aspirations articulated in 1776. Resonating far beyond the study of early American history, these ideals are reflected in and challenged by a range of disciplines, each offering us complimentary perspectives on how to pursue life, liberty and happiness today and in the 250 years to come.