
The Irish ate potatoes not because potatoes are optimal nutrition, but because you can grow enough potatoes on a small plot to keep a family alive when the English own all the good land and you're forbidden from hunting.
When the potato blight hit in 1845: 1 million dead, 1 million emigrated.
"But potatoes are a whole food!"
They're a survival food that kept people barely alive. The fact that an entire population depending on a single crop died en masse when that crop failed should tell you something about dietary resilience.
Modern nutritionists: "The traditional Irish diet was quite healthy."
The Irish who survived: "We ate potatoes because we had no other choice and many of us died."
English

