Tens of millions of US citizens wanted to enjoy alcoholic beverages.
Because it attempted to enforce an unpopular law.
Because only a minority of the population supported Prohibition.
Most people came to oppose Prohibition and disobeyed it.
It proved to be impossible to enforce prohibition effectively because so many people wanted to drink alcoholic beverages.
Because the law was so unpopular, even among people who choose not to drink alcohol.
Because it attempted to enforce an unpopular law.
Because only a minority of the population supported Prohibition.
Most people came to oppose Prohibition and disobeyed it.
social attitudes can make laws difficult to enforce
It proved to be impossible to enforce prohibition effectively because so many people wanted to drink alcoholic beverages.
# Social attitudes can make laws difficult to enforce
Neither the federal nor state governments were able to enforce prohibition effectively.
Because the law was so unpopular, even among people who choose not to drink alcohol.
Many reasons made it hard to enforce prohibition rules. Some of these reasons included large organized gangs of illegal alcohol drug traffickers, ease in smuggling in alcohol from Canada, and home breweries. Limited police manpower and crooked politicians compounded the problem.
Illegal production and distribution of alcoholic beverages prevailed, and the US government did not have the means or desire to enforce the prohibition required by the act. Organised crime took it on, was successful, and profited greatly and would be drinkers combined with them flocking to speakeasies and icarried booze in hip flasks, hollowed books etc. There is a saying that the good law is that which reflects what most people are doing. Prohibition set itself directly contrary to that.
the 18th amendment
It was the Volstead Act.