Final answer:
The failure of national Prohibition led to a public awareness that unpopular laws are difficult to enforce.
Step-by-step explanation:
The failure of national Prohibition led to a public awareness that unpopular laws are difficult to enforce.
During the Prohibition era, the ban on the sale, manufacture, and transportation of alcohol was widely violated, leading to an increase in organized crime and corruption among law enforcement officials. The illegal trade of alcohol, known as bootlegging, became rampant, and underground gangs took advantage of the high profits. The inability to effectively enforce Prohibition and the negative consequences that arose from it made the public realize that unpopular laws are challenging to enforce.