"What are men, Grandpa?" ask the little squirrels, and Grandpa tells them the tragic story, describing the terrible monsters and wars that look like a replay of WW1.
The Wise Owl finds a good book of rules that the Men must not have followed and reads this from it: "Ye shall rebuild the old wastes." Isaiah 61:4 says
And they shall build the old wastes, they shall raise up the former desolations, and they shall repair the waste cities, the desolations of many generations.The animals obey and name their new city "Peaceville".
It was nominated for an Academy Award but lost to a Disney cartoon.