Up until the Middle Ages, Kale was the most common green vegetable
in Europe.
Both flat and curly leaf varieties were available in Greece
from around the 4th Century BC, and these are seen as the ancient ancestors
of the Kale you eat today.
Kale has had a prolific effect on people in the UK, specifically in Scotland, where a group of writers who commonly wrote about traditional life in rural Scotland called themselves the Kailyard school.
Writers included JM Barrie, JJ Bell and George MacDonald.