Final answer:
The phrase 'You can't legislate morality' relates to the lesson learned from Prohibition, highlighting the challenges of enforcing laws that do not align with public sentiment.
Step-by-step explanation:
The student has asked about the expression, “You can’t legislate morality” which encapsulates the idea that laws are not always effective at instilling ethical behavior within a society. This phrase became prominent after the Prohibition era in the United States, a period when the production, transport, and sale of alcoholic beverages were banned. A significant number of people, including those involved in industries like syrup, wanted to repeal this law. The widespread sentiment was that Prohibition failed because it did not align with the prevailing attitude towards alcohol consumption. Despite this historical lesson, attempts to legislate morality persist in various legislative efforts.
\