6 ideas
Most of the roughly one million excess deaths in Ireland were caused by infectious diseases such as typhus, relapsing fever and dysentery, not by starvation itself. Hunger drove people onto roads, into crowded workhouses and public works, and weakened their immunity, which let epidemics spread. Famine relief therefore failed or succeeded partly on sanitation and crowd management, not only on food supply.
Excess deaths clustered in the west and southwest and fell most heavily on landless labourers and cottiers who depended on the potato for subsistence. Wealthier and more commercialised eastern districts suffered far less. The same crop failure produced very different death rates because vulnerability depended on each group's ability to buy substitute food, not on how much food existed in aggregate.
Grain and livestock exports from Ireland during the famine were small next to the calorie gap left by the potato's collapse. Keeping them at home would have eased suffering, especially in the first season, but could not by itself have prevented mass death, so imported maize and funded relief were also needed. Arguments built on 'food was leaving the country' capture a moral truth but misstate the arithmetic.
Price data show that Irish food markets across regions stayed reasonably integrated and responded as expected, and there is little evidence of systematic hoarding or speculative cornering. The famine was therefore less a failure of markets to move food than a failure of purchasing power among people whose subsistence crop had vanished. Well-functioning markets allocate food to those who can pay, which does not protect people who have no income.
In summer 1847 the government's temporary soup-kitchen scheme was feeding about three million people a day, and mortality fell while it ran. The state then wound it down and shifted the burden onto locally financed Poor Law unions, many of which were already insolvent in the poorest districts. The episode shows that large-scale relief was feasible, and that ending it contributed to the lethality of the later famine years alongside the practical constraints the book also weighs.
Over a million people emigrated during the famine, and this outflow reduced deaths at home. Emigration required fares and connections, however, so the very poorest were least able to leave and were the most likely to die. Assisted emigration aimed at the destitute would have been an inexpensive way to save lives, because the market in migration filtered out exactly the people most at risk.