This clip describes the Prohibition era in the United States. It explains the assumptions of Prohibition advocates and the actual negative impact of Prohibition on the United States both economically and socially. It also mentions that it was not actually illegal to consume alcohol during this time period. Finally, it notes that the passing of the 21st amendment was the first time in history that a constitutional amendment (the 18th amendment) had ever been repealed.
The town of Springfield starts enforcing prohibition after recent events involving alcohol are deemed poor examples for the children. Moe establishes a speakeasy under the moniker of a pet shop to circumvent law.