By the 1840s some three million of Ireland’s poorest lived almost entirely on the potato — the one crop that could feed a family from a rented scrap of ground under a landlord system that exported the rest. In September 1845 a fungus-like blight, Phytophthora infestans, newly arrived from the Americas, turned the crop to black slime in the fields. It took a third of that harvest, nearly all of the next, and returned through 1849.
Black ‘47
What followed was a catastrophe of policy as much as botany. The Tory government’s initial maize imports gave way, under the Whigs from 1846, to doctrine: famine relief must not disturb markets, property must pay for its own poor, and Ireland — in the words attributed to Treasury chief Charles Trevelyan, who saw providential judgment in the blight — must be left to “the operation of natural causes.” Relief lurched between underpowered public works (starving men breaking stones for wages that lagged food prices), soup kitchens that briefly fed three million and were shut down within months, and workhouses whose fever wards became mortuaries. Through it all, Ireland’s grain, cattle, and butter continued to be exported, sometimes under military escort, past the starving districts — legally correct and morally indelible.
Roughly one million people died — of hunger and, more, of famine fever, typhus, and dysentery — and well over a million fled: to Liverpool, to Britain’s slums, and across the Atlantic in the disease-ridden “coffin ships,” whose quarantine island at Grosse Île in Canada holds thousands of famine dead. Evictions cleared perhaps half a million people from the land as landlords consolidated ruined estates.
Small mercies came from strange distances: in 1847 the Choctaw Nation of Oklahoma — sixteen years off their own death-march, the Trail of Tears — collected $170 for Irish relief, a gift Ireland has commemorated ever since, most recently in kind during the pandemics and famines of others.
The scar on the map
Ireland’s population was about 8.5 million in 1845. By 1851 it was 6.5 million; emigration became a permanent institution, chain-funded by those who had gone before, and the decline continued for a century. The island’s population — even after decades of modern growth — remains below its pre-famine level: the only country in Europe with fewer people now than in the 1840s. The famine hardened the demand that Ireland govern itself, seeded an Irish-America that would fund that cause, and left a memorial landscape of abandoned villages, mass graves, and roads to nowhere built by the starving — the workhouse arithmetic of the Great Hunger, an Gorta Mór, written on the land.