- The difficulties in enforcing prohibition
- the alcohol trade was driven underground and developed into organised crime under the control of powerful gangsters
- Bootleggers such as Al Capone made large sums of money smuggling alcohol into the country
- Moonshiner's distilled their own illegal home brews
- Speakeasies selling illegal alcohol sprang up in large numbers by 1925 there were over 100,000 in New York
- Government prohibition agents were too few in number to enforce the prohibition law and they were often open to bribery.