" It would not be surprising if the villagers were afraid of these wild animals and tried to protect themselves from them, which would also explain why they had no doors or windows in their houses, so the animals could not get in that way. By using ladders, which the animals could not climb, the inhabitants were able to ensure their survival, at least from unwanted predators at night. No other explanation works as well. "

― Eric H. Cline , Three Stones Make a Wall: The Story of Archaeology