The Panama Canal is one of those achievements that history teaches us as a triumph, the kind that gets reduced to engineering statistics and completion dates. Oz has written something different: a reckoning with the human wreckage required to move the earth, and a reminder that every monument to progress is also a monument to someone's expendable labour.
The French Catastrophe
Oz begins where most accounts do — with Ferdinand de Lesseps, the celebrated builder of the Suez Canal, whose reputation alone convinced an international congress in 1879 that a sea-level canal through Panama's jungle was possible. But Oz does not treat de Lesseps as a visionary undone by circumstance. He paints him as a man whose greatest strength — absolute certainty in his own genius — became the instrument of mass death.
As Oz writes, "De Lesseps wanted a sea-level canal — just as at Suez — and de Lesseps got what he wanted. What followed was an apocalypse."
The French engineers who had actually walked the isthmus knew better. They proposed damming the Chagres River and using locks to lift ships over the continental divide. It was, nearly to the metre, the plan the Americans would eventually build. The congress voted them down. Reputation beat knowledge, and twenty-two thousand people paid the difference.
The disease dynamics were especially grotesque. Oz notes that French doctors, operating on the miasma theory that disease rose from foul air, decorated their hospital wards with potted plants sitting in saucers of water. "They had built, with loving care, breeding factories for the very creatures that were killing them." Three out of four patients never left.
And the dead were not French investors or engineers. They were Black labourers from Jamaica, Martinique, and Barbados — men who came chasing wages that dwarfed anything the Caribbean could offer and never came home. Thirty to forty perished daily in the wet seasons of 1882 and 1883. A nightly train carried their coffins to the cemetery. The living called it the funeral express.
The dead were often buried in the clothes they wore, stacked in mass graves, their names lost to the jungle.
The American Machine
The Americans who arrived in 1904 brought something different: a willingness to listen to the one person who understood that Panama was not a construction problem but a public health problem. William Crawford Gorgas, the son of a Confederate general, had already done the impossible in Havana. He exterminated the Aedes aegypti mosquito by draining swamps, oiling standing water, screening every window, fumigating every room. His own government called him a crank. His budget was slashed. His dismissal was recommended to the president.
The president gave him whatever he wanted. Within eighteen months, yellow fever — the plague that had reigned over the Caribbean for three centuries — vanished from the Canal Zone.
Oz puts it plainly: "The ancient plague that had beaten the French, that had emptied ships in Caribbean harbours for three centuries, was gone from the Zone. It took eighteen months."
Then came the construction. The Americans did not attempt a sea-level canal. They dammed the Chagres, flooded an entire river valley to create Gatun Lake, and built locks whose dimensions would define the maximum size of oceangoing ships for the next century. Forty-five thousand men worked the Zone, drawn from forty nations. The Culebra Cut — nine miles of blasting, shoveling, and hauling through the continental spine — was deafening, dusty, and lethal. Slides of volcanic clay and shale buried steam shovels and work trains. Men disappeared under wet earth.
The piece arrives at its most uncomfortable passage when Oz describes why recruiters crossed the Atlantic to Spain. The West Indian labourers, engineers complained, "were cheap but, not always efficient." One engineer described two West Indians loading debris onto a third's head to be carried away. So eight thousand Spaniards were brought in, paid twice the wage for three times the output. Oz acknowledges — without dwelling — that these discrepancies "reflected the racially segregated working conditions and racial attitudes of the time."
The World That Looked Away
On August 15, 1914, the SS Ancon completed the first official transit in nine hours and forty minutes. The canal had come in under budget and a year ahead of schedule. It was the largest, most expensive engineering project in human history.
Nobody noticed. German cavalry was riding through Belgium that same day. Oz closes on a chilling note: "The great powers had other ditches to dig now, other mud to die in. The Western Front would consume the same species of young men who had sweated in the Culebra Cut, but in numbers that dwarfed any canal."
It is a deliberate parallel. The Culebra Cut killed men to move earth. The Somme killed men to move lines on a map by inches. Both were projects of a confident, muscular, casually brutal age — one that believed continents could be rearranged and counted the cost in other people's bodies.
Critics might note that Oz's narrative leaves the Panamanian revolution of 1903 — a bloodless coup orchestrated by Washington with American warships conveniently offshore — too quickly dismissed as a footnote. The permanent sovereignty the United States extracted over a ten-mile-wide strip was its own kind of conquest, and the consequences of that arrangement would fuel anti-American sentiment across Latin America for a century. Critics might also observe that the Spanish labourers, positioned here as more "efficient" than West Indians, are not given a voice of their own, nor is the racialized wage structure examined with the same intensity applied to the French hospital's potted plants.
Bottom Line
This is engineering history written as moral accounting. Oz does not ask readers to be impressed by the Panama Canal; he asks them to look at the cost column. The locks still lift ships. The names of most of the dead are still lost.