BEIJING – The United States enters its 250th year at a moment when confidence in its political model is under growing strain. Amid deepening domestic polarization and a contested role abroad, a vital question looms: can Washington bridge the widening chasm between its rhetoric and actions?

For generations, the US has cast itself as "the American Experiment" – an ongoing effort to prove that "constitutional government, representative democracy, and individual liberty can sustain a modern nation." Two hundred and fifty years later, however, that experiment is facing its most demanding test.

The real question is no longer what America achieved over the past 250 years, but whether its institutions can still solve its own problems, whether its foreign policy remains suited to a changing world, and whether its leadership is prepared to adapt to an increasingly multipolar international order.

The first test begins at home.

A foundational premise of "the American Experiment" is that its institutions possess a supposed inherent capacity for self-correction. Today, that capacity is under severe strain.

Deepening political confrontation has made bipartisan consensus elusive, while sharp policy reversals between administrations have shattered continuity on issues ranging from healthcare and immigration to climate change. Meanwhile, generational challenges – including racial inequality, gun violence, and widening social divisions – remain unresolved despite repeated promises of reform.

The question facing the US is therefore no longer simply whether its political institutions endure, but whether they remain capable of governing effectively and responding to the expectations of its own people.

The second test lies beyond its borders.

While "the American Experiment" claims to champion democracy, sovereignty and the rule of law, its conduct abroad has too often signaled a darker contradiction.

From military interventions and regime-change operations in countries such as Venezuela, to the Iraq War and its recent military strikes against Iran that has destabilized the Middle East and threatened global energy security, Washington has repeatedly demonstrated a willingness to use force, coercion and economic pressure to pursue its strategic objectives.

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Nor have its allies been immune. Sweeping tariffs against partners and repeated threats to take Greenland have raised growing concerns that, for Washington, alliances are increasingly treated as instruments of convenience rather than partnerships based on mutual respect.

The resulting disparity between Washington's professed principles and its global conduct has grown too stark to ignore. The challenge facing the US is no longer its capacity to project values outward, but its willingness to bound its own power by those very same standards.

The third, and perhaps most consequential test is whether "the American Experiment" can adapt to a new era.

Today, economic globalization, technological transformation and shared challenges such as climate change, artificial intelligence, cybersecurity and public health have made international cooperation an imperative rather than an option. At the same time, the rise of emerging economies and the growing influence of the Global South are accelerating the transition toward a more multipolar world.

In such an environment, global leadership can no longer be defined by the ability to shape the world in one's own image. Instead, it increasingly depends on the willingness to respect diverse development paths, engage as an equal partner and contribute to solutions for common challenges.

The test is not whether the US remains influential, but whether it is prepared to transcend the mindset of exceptionalism and adapt to a world where cooperation, rather than domination, has become the foundation of lasting stability.

For 250 years, "the American Experiment" has claimed to be a work in progress rather than a finished project. Its next chapter will not be judged by the ideals it proclaims, but by its ability to narrow the gap between principle and practice, renew confidence at home and embrace a more cooperative approach abroad.

Ultimately, adapting to a multipolar world is not merely a test for Washington, but a necessity for global peace and development.