The ‘Donroe Doctrine’ and Why It Matters for Australian Businesses
Australian businesses are operating in a more complex geopolitical environment, and the ‘Donroe Doctrine’ is part of that story.
Recent developments in the United States offer a glimpse of how Washington is beginning to use its power in different ways in the Western Hemisphere. These shifts could reshape global markets, and strategic and operational settings that matter for Australian businesses. Understanding what the Donroe Doctrine is, why it has emerged now, and how it signals changing power dynamics helps Australian businesses anticipate shifts in their operating environment and prepare for the risks and opportunities that may follow.
What is the Donroe Doctrine?
The term ‘Donroe Doctrine’ emerged in early 2025 and gained momentum following recent US actions. At its simplest, the term describes a shift in the US’ approach to the Western Hemisphere – a term that is usually understood to encompass the continents of North and South America.
ICYMI, the ‘Donroe Doctrine’ is a play on the ‘Monroe Doctrine’ – the Donald Trump edition. In 1823, then‑US President James Monroe introduced foreign policy designed to keep European powers from interfering in the political affairs of the Americas, declaring that any attempt by Europe to control or influence the newly independent countries of Latin America would be viewed as a hostile act against the United States. It was based on the concept of separate spheres of influence: the US would stay out of European politics and expected the same from Europe in what it considered to be its own region in return.
Interestingly, when the Monroe Doctrine was first announced, Latin American countries were broadly supportive of keeping Europe out of their affairs after being decolonised, but that didn’t equate to ideological support for the US as their protector. However, by the early 20th century, as the US became powerful enough to enforce the doctrine, the idea became strongly opposed as it was perceived to be a cover for potential violations of sovereignty.
The Donroe Doctrine draws on that history but applies it in a new way, signalling increasing US willingness to take more direct action in the Western Hemisphere when it believes its interests are affected. President Trump has presented his approach as a stronger, updated version, declaring that American influence in the region “will never be questioned again.”
A Shift in US Strategy: What the Donroe Doctrine Represents
In this context, the Donroe Doctrine is not only about (re‑)asserting US power and influence; it also signals a wider interpretation of what counts as a threat and a willingness to respond to those threats with tools the US had previously been more cautious about using.
In addition to traditional military or geopolitical risks, the US administration is treating a wider set of issues, including narco‑terrorism, organised crime, migration pressures, and the influence of foreign powers, as direct threats to US security and strategic stability. In Venezuela, for example, President Trump argued that the country was “hosting foreign adversaries,” acquiring offensive weapons, and undermining US economic interests by seizing American oil assets.
The traditional geopolitical risks are still present. US officials have pointed to external competitors’ activities in Venezuela and elsewhere as evidence that foreign powers are expanding their influence in ways that could constrain US decision‑making or weaken its long‑held position in the West.
The Donroe Doctrine response
Within this worldview, traditional diplomatic norms are seen as insufficient to counter these trends. The Donroe Doctrine posits that unless the United States acts more decisively, it risks losing influence, security leverage, and access to critical resources and relationships. The appropriate response, according to the US administration, is to emphasise strength over international diplomatic norms, with more willingness to act unilaterally and demonstrate US resolve.
The Donroe Doctrine’s emphasis on unilateral action marks a departure from post‑war norms that prioritised specific, time-bounded actions based on multilateralism and sovereignty. The Donroe Doctrine frames intervention not as an exception, but as a normal policy tool. Unlike earlier, case‑by‑case interventions, Donroe asserts a standing hemispheric prerogative. States can interpret risks to their own security, and use broad, non‑military threats to justify unilateral action, this sits uneasily with international law. Modern law, shaped by the UN Charter, restricts force to self‑defence or Security Council authorisation and emphasises sovereignty and non‑intervention. Analysts warn the Donroe Doctrine approach risks sidelining the legal frameworks designed to manage cross‑border threats and instead moves the US toward a discretionary, spheres‑of‑influence model.
To date, the Venezuela raid remains the most visible demonstration of the Donroe Doctrine in practice. It showed that the US is willing to pursue rapid, targeted operations to influence political outcomes when it sees its interests threatened and sees value in acting alone. Future areas of focus could include other parts of Latin America and Greenland, although Congress is already examining ways to limit unilateral action.
If the Donroe Doctrine continues to guide US policy, it will signal changes in global dynamics and stability, reshaping the operating environment for Australian firms.
Why This Matters for Australian Businesses
The Donroe Doctrine is part of two interlinked global trends: a broader definition of interests and threats, and faster, more direct geopolitical action by major powers. These trends affect Australian businesses across several dimensions.
1. Heightened geopolitical volatility A stronger US posture in the Americas may encourage other major powers to take more assertive steps in their own regions, reinforcing strategic competition involving China and Russia and increasing uncertainty.
2. Supply‑chain exposure Industries such as resources, energy, agribusiness and logistics often rely on supply chains or shipping routes connected to the Americas. If the US expands operations targeting narco‑terrorist activity at sea or on land, disruption risks rise, affecting maritime routes, sanctions exposure and shipping reliability.
3. Alliance dynamics Concerns in Denmark about US activity in Greenland show how alliance dynamics may shift. Pressure within NATO can influence Australia’s defence, research and trade relationships with European partners.
4. Indo‑Pacific strategic balance If US attention leans more heavily toward the Western Hemisphere, its focus on the Indo‑Pacific may narrow. This could shift strategic expectations and affect Australian companies with operations in the Indo-Pacific region.
The bottom line
The Donroe Doctrine is still developing, but its direction is clear: the US is adopting a more assertive, intervention‑focused approach in its region. Whether these efforts succeed matters less than what they signal; a more fluid, contested and unpredictable geopolitical environment. For Australian businesses, the implications lie not only in developments across the Americas but in how these shifts reshape the networks, partnerships and regions that underpin Australia’s economy.
