Panama

Panama is not a country that happened to acquire a canal. It is a canal that happened to acquire a country. The distinction matters. Every important fact about Panamanian politics, economics, sovereignty, and strategic significance flows from a single geographic circumstance: this is the narrowest point in the Western Hemisphere, the place where the Atlantic and Pacific come closest to touching. Empires noticed this four centuries before the first shovel broke ground. The Spanish hauled silver across the isthmus on mule trains. The Americans, less patient, cut the continent in half. The result is a nation whose entire reason for existence — its independence from Colombia, its economic model, its relationship with the United States, its vulnerability to climate change — is a consequence of where it sits on the map.

Geographic Foundations¶

The Isthmus¶

Panama is an S-shaped ribbon of land connecting North and South America, stretching roughly 770 kilometres from the Colombian border in the east to Costa Rica in the west. At its narrowest point, near the canal, the distance from ocean to ocean is barely 80 kilometres. The country is small — 75,517 square kilometres, slightly larger than Ireland — and its shape is dictated by the tectonic collision that created the Central American land bridge roughly three million years ago. That geological event reshaped global ocean currents, contributed to the formation of the Gulf Stream, and triggered the Great American Interchange of species between the two continents. Panama’s existence altered the planet’s climate before a single human set foot on it.

The terrain is dominated by a mountainous spine — the Cordillera Central — that runs the length of the country, reaching 3,475 metres at Volcán Barú near the Costa Rican border. The mountains drop sharply to narrow coastal lowlands on both sides: the Caribbean coast to the north, wetter and less developed; the Pacific coast to the south, where Panama City and the bulk of the population reside. The country is almost entirely within the tropics, with a wet season from May to December and a dry season from January to April. Annual rainfall varies dramatically — over 3,000 millimetres on the Caribbean slope, considerably less on the Pacific side. Panama sits below the hurricane belt, sparing it the catastrophic storms that regularly devastate its Central American neighbours — another geographic advantage that has facilitated its role as a commercial and financial hub.

Two Coastlines, One Purpose¶

Panama’s Caribbean coast faces the Atlantic approaches. The Pacific coast faces the world’s largest ocean. The entire logic of the canal — and therefore the entire logic of the country — rests on the proximity of these two bodies of water. A ship sailing from New York to San Francisco without the canal must travel approximately 20,900 kilometres around Cape Horn. Through the canal, the distance is roughly 8,400 kilometres. That difference — 12,500 kilometres of ocean saved — is the foundation of Panama’s wealth and the reason great powers have fought over its territory for a century.

The canal does not cut through flat terrain. It traverses a landscape of hills, jungle, and the artificial Gatun Lake — one of the largest man-made bodies of water in the world when it was created in 1913 by damming the Chagres River. Ships do not sail through a trench at sea level; they are lifted 26 metres above the ocean by a series of locks, cross the lake, and are lowered back down on the other side. This engineering choice — using a lake rather than digging to sea level — was the decision that made the canal buildable. It also made the canal permanently dependent on rainfall.

The eastern border with Colombia is occupied by the Darién Gap — a 100-kilometre stretch of roadless jungle and swamp that constitutes the only break in the Pan-American Highway, which otherwise runs from Alaska to Patagonia. This impenetrable terrain has functioned as a barrier between Central and South America for centuries, channelling human movement through Panama’s urbanised canal corridor while leaving the Darién itself as one of the most biologically diverse and least governed regions in the Western Hemisphere.

The Canal¶

Engineering and Construction¶

The Panama Canal is 82 kilometres long from deep water in the Atlantic to deep water in the Pacific. A transit takes eight to ten hours. The story of its construction is a story of failure followed by ruthlessness. The French attempt under Ferdinand de Lesseps — the man who had built the Suez Canal — began in 1881 and collapsed by 1889, defeated by yellow fever, malaria, landslides, and financial scandal. An estimated 20,000 workers died during the French effort alone. De Lesseps had insisted on a sea-level canal, the approach that had worked at Suez; the Panamanian terrain, unlike the flat Egyptian desert, refused to cooperate.

The American construction phase (1904-1914) succeeded for two reasons. First, military doctors — particularly William Gorgas — understood that mosquitoes transmitted the diseases that had killed the French workforce, and a systematic campaign of drainage, fumigation, and sanitation brought yellow fever and malaria under control. Second, the Americans abandoned the sea-level concept and adopted a lock-based design that worked with the terrain rather than against it. Even so, over 5,600 workers died during the American construction — predominantly West Indian labourers brought from Barbados, Jamaica, and other Caribbean islands. The canal was built on Caribbean bones, and the racial hierarchy of the construction workforce — white Americans in supervisory roles, Black West Indians performing manual labour — was replicated in the Canal Zone’s permanent social structure.

How the Locks Work¶

The canal uses three sets of locks to lift ships 26 metres from sea level to Gatun Lake and lower them back down on the other side. On the Atlantic side, the Gatun Locks raise vessels in three steps. Ships then cross Gatun Lake — a transit of roughly 33 kilometres through the flooded Chagres River valley — before entering the Culebra Cut, an eight-kilometre channel blasted through the Continental Divide. On the Pacific side, the Pedro Miguel Lock lowers ships one step to Miraflores Lake, and the Miraflores Locks lower them two more steps to Pacific sea level.

Each lockage consumes roughly 200 million litres of freshwater, which flows by gravity from Gatun Lake through the lock chambers and into the ocean. The water is not pumped; it is not recycled in the original locks; it is simply lost to the sea with every transit. This means that every ship that passes through the canal drains the lake. The system works because, in a normal year, tropical rainfall replenishes Gatun Lake faster than the locks drain it. In an abnormal year, it does not.

Panamax and Neo-Panamax¶

The original lock chambers are 33.5 metres wide and 304.8 metres long — dimensions that defined the maximum size of commercial and naval vessels for a century. Ships built to fit these locks became known as Panamax: the largest vessel that could squeeze through the original canal. Panamax was not just a shipping term; it was a de facto global standard that shaped naval architecture, port design, and supply chain logistics for decades.

The $5.25 billion expansion completed in June 2016 added a third set of locks — the Agua Clara locks on the Atlantic side and the Cocolí locks on the Pacific side — capable of handling Neo-Panamax vessels up to 49 metres wide and 366 metres long. The new locks roughly doubled the canal’s cargo capacity and opened it to ships carrying up to 13,000 TEU (twenty-foot equivalent units) of containers, compared to the 5,000 TEU limit of the original locks. The Neo-Panamax locks use water-saving basins that recycle approximately 60 percent of the water per lockage — an engineering response to the water consumption problem, though one that reduces rather than eliminates the canal’s thirst.

Trade Volume and Revenue¶

Approximately 13,000-14,000 vessels transit the canal annually, carrying roughly five to six percent of global seaborne trade by volume. The cargo is diverse: container ships carrying consumer goods between Asia and the US East Coast, bulk carriers hauling grain from the American Midwest to Asian markets, LNG tankers connecting Gulf Coast liquefaction terminals with buyers in Japan and South Korea, vehicle carriers, and cruise ships. The canal is particularly critical for US trade — roughly 72 percent of canal traffic either originates in or is destined for American ports.

The Panama Canal Authority collected approximately $4.6 billion in toll revenue in fiscal year 2024 — a figure that represents a substantial portion of the Panamanian government’s fiscal capacity. The canal is, in effect, a tollbooth positioned at the most important maritime shortcut on Earth. Panama holds the key, and the entire world pays to use it.

Historical Arc¶

A Colombian Province¶

Panama was a province of Colombia — and before that, of Gran Colombia, and before that, of the Spanish Viceroyalty of New Granada — from independence in 1821 until 1903. The isthmus had been recognised as a strategic transit point since the colonial period: Spanish treasure from Peru crossed it on mule trains en route to Seville. The California Gold Rush of 1849 transformed it into a major transit corridor, and the Panama Railroad, completed in 1855 by American investors, was one of the most profitable railways in the world — connecting the Atlantic and Pacific five years before the American transcontinental railroad was even begun.

Colombian sovereignty over the isthmus was nominal in practice. Bogotá was separated from Panama City by the roadless Darién jungle; communication was often faster by sea via Jamaica than overland. The province rebelled against Colombian authority repeatedly — by some counts, more than fifty times in the nineteenth century. The isthmus had its own commercial elite, oriented toward international trade rather than Colombian domestic politics, and a persistent sense that Bogotá’s governance was distant, incompetent, and extractive.

US-Backed Independence, 1903¶

The immediate cause of Panamanian independence was the canal. When Colombia’s Senate rejected the Hay-Herrán Treaty in August 1903 — which would have granted the United States rights to build and control a canal zone — the Roosevelt administration decided that Colombia’s refusal was an obstacle to be removed rather than a sovereign decision to be respected. Washington supported Panamanian separatists, deployed the USS Nashville to prevent Colombian troops from reaching the isthmus, and recognised the Republic of Panama on November 6, 1903, three days after the declaration of independence.

The Hay-Bunau-Varilla Treaty, signed just two weeks later by a French engineer acting as Panama’s representative — Philippe-Jean Bunau-Varilla, who had never been authorised by the Panamanian provisional government to negotiate such terms — granted the United States sovereign control over a ten-mile-wide Canal Zone “in perpetuity” and the right to act “as if it were sovereign” within it. Panama gained independence from Colombia and immediately surrendered its most valuable territory to the power that had midwifed its birth.

“I took the Isthmus,” Roosevelt said. He was not exaggerating. Colombia received $25 million in compensation in 1921, but the wound persisted for generations. The episode remains a defining moment in Latin American perceptions of US power — and the original sin of Panamanian sovereignty.

The Canal Zone, 1904-1979¶

The Canal Zone was American territory in everything but name: governed by a US-appointed governor, policed by US forces, populated by American employees who lived in manicured suburbs with English-language schools, baseball fields, and commissaries stocked with American goods. Panamanians were employed as labourers but excluded from the Zone’s social infrastructure. The arrangement was colonial in character and increasingly resented.

The 1964 Flag Riots — triggered when American students in the Zone refused to fly the Panamanian flag alongside the US flag, and Panamanian students who attempted to raise their flag were met with violence — killed over twenty Panamanians and four US soldiers. The episode broke diplomatic relations temporarily and accelerated the negotiations that would eventually produce a transfer of sovereignty.

Torrijos-Carter Treaties, 1977¶

General Omar Torrijos, who seized power in 1968, made canal sovereignty the central project of his rule. The Torrijos-Carter Treaties, signed in 1977 with President Jimmy Carter, provided for the gradual transfer of the Canal Zone to Panama and the full handover of the canal itself on December 31, 1999. A companion Neutrality Treaty declared the canal permanently neutral and open to vessels of all nations, while reserving the right of the United States to defend the canal’s neutrality — a provision that gave Washington a legal basis for continued strategic interest even after the handover.

The treaties were bitterly opposed by American conservatives. Ronald Reagan campaigned against them, declaring: “We built it, we paid for it, it’s ours.” The Senate ratified them by a single vote. Torrijos died in a plane crash in 1981 under circumstances that remain disputed.

Noriega and the US Invasion, 1989¶

Torrijos’s intelligence chief, Manuel Noriega, gradually assumed power and transformed Panama into a narco-state. Noriega had been a CIA asset for years — useful for channelling American support to the Contras in Nicaragua and for providing intelligence on leftist movements in Central America. When his drug trafficking, money laundering, and political repression became too embarrassing to ignore — and when he annulled a presidential election won by the opposition in May 1989 — the United States invaded.

Operation Just Cause, launched on December 20, 1989, deployed 27,000 troops and overthrew Noriega within days. The invasion killed several hundred Panamanian civilians — estimates range from 200 to over 1,000, with the lower figures from official US sources and the higher from Panamanian and independent observers. The neighbourhood of El Chorrillo was devastated. Noriega was captured, tried in Miami on drug charges, and imprisoned. The legitimately elected Guillermo Endara was installed as president.

The invasion was the last unilateral US military intervention in Latin America — a final expression of the Monroe Doctrine in its most coercive form. It demonstrated, with brutal clarity, the limits of Panamanian sovereignty when American interests were at stake.

The Handover, 1999¶

The canal transfer proceeded as scheduled at noon on December 31, 1999. The last American troops departed, the Canal Zone ceased to exist, and Panama assumed full control of the waterway. The transition has been, by any measure, a success. The Panama Canal Authority has operated the canal more profitably and efficiently than the Americans did — expanding it, modernising it, and generating billions in revenue that have transformed Panama City into one of Latin America’s most modern capitals, a skyline of glass towers rising improbably from the jungle.

Water Crisis and Climate Vulnerability¶

The Freshwater Dependency¶

The canal’s Achilles heel is water. Every lockage drains Gatun Lake. Every transit depends on freshwater that originates as rainfall in the Chagres River watershed — a tropical forest catchment that also supplies drinking water to Panama City’s 1.5 million residents. Deforestation, urbanisation, and growing municipal water demands have placed increasing pressure on the system even in normal years. The 2016 expansion, while including water-saving basins, increased total water demand by adding a third lane of transits.

The 2023-2024 Drought¶

In 2023 and 2024, an El Niño-driven drought reduced rainfall across central Panama to historic lows. Gatun Lake’s water level dropped to levels that threatened canal operations. The Panama Canal Authority was forced to impose increasingly severe transit restrictions: first reducing the maximum draft of vessels, forcing ships to carry less cargo; then cutting the number of daily transits from the normal 36-38 to as few as 22-24.

The consequences rippled across global supply chains. Ships queued for days or weeks waiting for transit slots. The canal authority auctioned priority passages — one LNG carrier reportedly paid $4 million for the privilege of skipping the queue. Some shipping companies rerouted vessels around Cape Horn or through the Suez Canal, adding weeks of transit time and millions in fuel costs. The crisis coincided with Houthi attacks disrupting Red Sea shipping near the Suez, creating a moment in which both of the world’s most important artificial waterways were simultaneously compromised — a scenario that forced shippers to go around entire continents.

A Structural Problem¶

The drought was not an anomaly; it was a signal. Climate models project increasing rainfall variability in the Central American tropics, with more intense dry seasons and less predictable wet seasons. The canal — designed in an era when rainfall patterns were assumed to be stable — faces a future in which the water it needs to function may not reliably arrive. The Panama Canal Authority has proposed constructing a new reservoir on the Río Indio to supplement Gatun Lake, but the project would require relocating communities and faces local opposition. The fundamental tension is inescapable: the most important artificial waterway on Earth depends on rain falling in the right place at the right time, and nobody controls the rain.

Financial Hub¶

Banking and Opacity¶

Panama’s geography made it a transit point for goods. Its legal and regulatory framework made it a transit point for money. The country hosts one of Latin America’s largest banking centres — over 70 banks, including subsidiaries of major international institutions — built on dollar-denominated transactions (Panama has used the US dollar as legal tender since 1904), territorial taxation (only domestic income is taxed), and corporate secrecy laws designed to attract foreign capital with minimal questions about its origins.

The Panama Papers leak in 2016 — 11.5 million documents from the law firm Mossack Fonseca — revealed the industrial scale of Panama’s role in global financial opacity. The documents exposed how politicians, oligarchs, criminals, and tax evaders worldwide used Panamanian shell companies and bearer-share corporations to hide assets, evade taxes, and launder money. The scandal cost prime ministers their jobs, triggered investigations across dozens of countries, and permanently associated Panama’s name with the murkier dimensions of globalised finance. Panama has since tightened some regulations under international pressure, but the fundamental business model persists.

Flag of Convenience¶

Panama operates the world’s largest ship registry. Over 8,000 vessels fly the Panamanian flag — roughly 16 percent of the global merchant fleet by tonnage. Ships register in Panama for the same reasons money flows through Panamanian banks: low taxes, minimal regulation, and limited scrutiny. The “flag of convenience” system allows shipowners to avoid the labour standards, safety requirements, and tax obligations of their home countries. Panama profits from the registration fees; shipowners profit from the regulatory arbitrage. The arrangement is legal, lucrative, and a persistent source of criticism from maritime labour organisations and environmental advocates.

Colón Free Trade Zone¶

The Colón Free Trade Zone, on the Caribbean coast near the canal’s Atlantic entrance, is the largest free trade zone in the Western Hemisphere and the second-largest in the world after Hong Kong. Established in 1948, it functions as a re-export hub — goods arrive from China, Japan, and other Asian manufacturers, are stored and redistributed to Latin American and Caribbean markets. Annual trade volumes have exceeded $20 billion in peak years. The zone is integral to Panama’s position as a logistics hub, leveraging the same geographic advantage that makes the canal valuable: proximity to both oceans and to major shipping lanes.

US-China Competition¶

The American Legacy¶

The United States built the canal, controlled it for eighty-five years, invaded the country, and remains the dominant external power in Panamanian affairs. The 1977 Neutrality Treaty gives Washington the legal basis to intervene militarily if the canal’s operation is threatened — a provision that, combined with the US Southern Command’s close relationships with Panamanian security forces, ensures that American strategic interest in Panama is not merely historical but operational.

The canal’s commercial importance to the American economy is immense. Grain exports from the Midwest, LNG shipments from the Gulf Coast, container traffic between East Coast ports and Asia — all depend on the canal’s reliable operation. Roughly 72 percent of canal traffic either originates in or is destined for American ports. The United States has more at stake in the canal’s operation than any other single country, and this economic dependence translates into persistent strategic attention.

Chinese Investments and Influence¶

China’s interest in Panama is strategic and growing. The 2017 diplomatic recognition switch from Taiwan to the People’s Republic was one of several Central American and Caribbean states that Beijing peeled away from Taipei, reflecting both Chinese diplomatic pressure and the hard economic logic that China, not Taiwan, represented the larger commercial partner. Chinese investment in Panamanian infrastructure has expanded: Hutchison Ports, a Hong Kong-based conglomerate, has operated container terminals at both ends of the canal — in Balboa on the Pacific and Cristóbal on the Caribbean — since the late 1990s. Under the national security law imposed on Hong Kong in 2020, the line between Hong Kong corporate autonomy and Beijing’s political authority has blurred, and American strategists view Hutchison’s port concessions with increasing alarm.

In early 2025, reports emerged that CK Hutchison was negotiating to sell its global port operations, including the Panama terminals, to a consortium involving a BlackRock-affiliated entity — a development widely interpreted as responding to US pressure to reduce Chinese-linked control of strategic infrastructure.

Trump’s Canal Rhetoric¶

President Trump publicly floated the idea of “taking back” the canal in late 2024 and early 2025, citing Chinese influence and excessive toll charges. The rhetoric drew on the same strain of American politics that opposed the Carter-Torrijos Treaties in the 1970s. There is no legal mechanism for the US to reclaim the canal, and military intervention against a treaty ally would be strategically catastrophic for American credibility across Latin America. But the statements reflected genuine anxieties: that China is building strategic influence in a region Washington has historically treated as its backyard, and that the canal — the most important piece of infrastructure the United States ever built outside its own borders — is now subject to influences Washington cannot fully control.

Panama, for its part, plays the game that small states at strategic chokepoints have always played: extracting maximum benefit from the competition between great powers without committing irrevocably to either.

Geopolitical Significance¶

Chokepoint Vulnerability¶

The Panama Canal belongs to a small category of geographic features — alongside the Suez Canal, the Strait of Hormuz, the Bab el-Mandeb, and the Strait of Malacca — whose disruption sends immediate shockwaves through the global economy. These chokepoints share a common characteristic: they are irreplaceable in the short term. When the Ever Given blocked the Suez Canal for six days in 2021, global trade losses were estimated at $9.6 billion per day. A prolonged closure of the Panama Canal — whether from drought, conflict, or infrastructure failure — would produce comparable economic disruption.

The canal’s vulnerability was historically framed as military: the fear that an adversary would bomb or sabotage the locks. Today, the more plausible threats are hydrological and climatic. The 2023-2024 drought demonstrated that nature can restrict the canal’s capacity as effectively as any military attack. A sustained multi-year drought — which climate projections suggest is increasingly possible — could reduce the canal to a fraction of its normal throughput, forcing permanent rerouting of global shipping.

Alternative Routes¶

The canal’s value depends partly on the absence of viable alternatives. A Nicaraguan canal — discussed for over a century and briefly revived in 2013 when a Chinese businessman secured a concession from the Ortega government — would require an investment of $50-100 billion, would cross Lake Nicaragua (Central America’s largest freshwater body, raising enormous environmental concerns), and has been effectively abandoned. The Arctic sea routes opened by melting ice offer theoretical alternatives for some trade flows but remain seasonal, poorly charted, and logistically impractical for most commercial shipping.

The practical alternative to the Panama Canal is not another canal but the Suez Canal — and vice versa. When one chokepoint is disrupted, traffic shifts to the other. When both are disrupted simultaneously — as partially occurred in 2024 — the global logistics system has no adequate backup. Ships must go around continents, adding weeks to transit times and billions to shipping costs. The vulnerability is systemic, and there is no engineering solution on the horizon.

The Drug Corridor¶

Panama’s position between South America’s coca-producing regions and North American consumption markets makes it an unavoidable transit point for narcotics. Colombian cocaine moves north through the Darién Gap, by boat along both coasts, and by air. The Darién is also the route for the surging flow of migrants heading toward the US border — over 520,000 people crossed in 2023 alone — creating a convergence of drug trafficking, human smuggling, and humanitarian crisis in some of the most impenetrable terrain in the Americas. Panama’s banking system, free trade zone, and flag-of-convenience registry all provide opportunities for money laundering that complement the physical drug transit. The narcotics dimension adds a permanent layer of security concern and reinforces Panama’s dependence on American security cooperation.

The Sovereignty Paradox¶

Panama’s control of the canal is the foundation of its sovereignty, its economy, and its national identity. The country has managed the waterway successfully since 1999, investing in expansion, maintaining operational standards, and generating revenue that has given Panama a per capita income of roughly $17,000 (PPP) — more than double that of Guatemala or Honduras. But sovereignty over a global chokepoint is never absolute. Panama exists in a web of constraints: American treaty rights, Chinese economic interests, climate vulnerability, drug trafficking pressures, and the expectations of a global shipping industry that depends on the canal’s reliable operation.

This is the permanent condition of chokepoint states: their geography gives them leverage that far exceeds their size, but the same geography makes them targets of great-power attention that constrains their freedom. Panama is richer and more stable than its Central American neighbours, but it is also more exposed. Every drought, every shift in great-power competition, every disruption to global trade reminds Panama that its prosperity depends on a waterway it controls but cannot fully protect — from the forces, climatic, geopolitical, and economic, that operate at scales far beyond any small nation’s capacity to manage.

Sources & Further Reading¶

• “The Path Between the Seas” by David McCullough (1977) — The definitive narrative history of the Panama Canal’s construction, from the French failure to the American triumph, essential for understanding the engineering, political, and human dimensions of the project.

• “The Big Ditch” by Noel Maurer and Carlos Yu (2011) — An economic and political history of the canal that examines how the waterway shaped Panama’s political economy, US-Latin American relations, and global trade patterns across a century.

• “South America’s Narrow Waist” by Marixa Lasso (2019) — A history of Panama that centres Panamanian agency rather than treating the country as a passive object of American strategy.

• “Panama Papers: Breaking the Story of How the Rich and Powerful Hide Their Money” by Bastian Obermayer and Frederik Obermaier (2016) — The investigative journalists’ account of the Mossack Fonseca leak, essential for understanding Panama’s role in the global offshore financial system.

• International Crisis Group, “Bottleneck of the Americas: Crime and Migration in the Darién Gap” (2024) — The most comprehensive analysis of the Darién migration and security crisis, covering humanitarian, security, and geopolitical dimensions.