The Setup
Prohibition began in 1920. Alcohol became illegal. The federal government enforced the ban through the Volstead Act. You could not legally buy, sell, or manufacture alcohol.
But you could gamble. Gambling was illegal in most states, but it was not federally prohibited. It existed in a legal gray area. In some states, it was tolerated. In others, it was actively prosecuted.
When alcohol became illegal, organized crime stepped in to supply it. They made enormous profits. They also discovered that illegal gambling was similarly profitable. Casinos operated underground. They took a rake (commission) on every hand. The rake was money with zero operational costs.
The Economics
A speakeasy (an illegal bar) served alcohol and sometimes hosted gambling. The space was leased. Alcohol was purchased from bootleggers (illegal suppliers). The markup was 400 to 500%. A bottle that cost five dollars retail sold for 20 to 25 dollars at a speakeasy.
Gambling was easier. You set up a card table. You hired dealers. You took 5 to 10% of every pot. No inventory cost. No supply chain. Just pure rake.
Criminal enterprises recognized this. They invested in casinos more than speakeasies. Casinos were more profitable and required less inventory management.
Geography
Prohibition was nationally enforced, but enforcement varied. Some areas were strict. Others were corrupt. Police took bribes. Judges looked the other way.
Cities with corrupt officials hosted casinos openly. Chicago. New York. Los Angeles. These cities had semi-legal gambling during Prohibition. Police were paid off. The casinos operated.
Smaller towns with strict enforcement had gambling, but it was more secretive. Back rooms. Basements. Games that could be packed up and moved if police arrived.
The Criminal Structure
Organized crime families ran the casinos. They provided security. They enforced rules. They protected against theft. A casino without protection is a target. Criminals solve this problem through violence and intimidation.
Mobsters like Al Capone made enormous sums from gambling. Capone controlled Chicago's casinos. He employed dealers, managers, security. He had a structure. He had profit margins.
When Prohibition ended in 1933, Capone's alcohol profits disappeared. But his gambling empire remained. Gambling was still illegal in most places, but it was still profitable. The criminals stayed in the game.
The Transition to Legal Casinos
In 1931, Nevada legalized gambling. This was partly economic (the state needed revenue) and partly recognition that gambling was happening anyway. Why not license it and tax it.
Criminals quickly moved into Nevada. Bugsy Siegel built the Flamingo. Meyer Lansky invested heavily. The Mob brought their expertise in running casinos to legal territory.
Once casinos were legal in Nevada, the criminals had to decide: stay underground or move to Nevada. Some moved. Some stayed underground. Eventually, legal casinos in Nevada and other states replaced illegal casinos.
But the transition took decades. Illegal gambling remained profitable into the 1970s and 1980s because casinos were not available everywhere. Once casinos spread to Atlantic City (1976), Native American reservations (1990s), and other locations, illegal gambling declined.
What Prohibition Taught
Prohibition taught that banning something profitable makes it attractive to criminals. It taught that enforcement costs money and fails if corruption is widespread. It taught that legalization and regulation are more profitable (for the government) than prohibition.
Gambling's profitability was proven during Prohibition by criminal enterprises. When Prohibition ended and gambling was partially legalized, the legitimate casino industry took off. The Mob had already demonstrated the business model. Legal entrepreneurs just copied it.
Conclusion
Prohibition did not cause gambling. Gambling desire was always there. But Prohibition removed alcohol as an outlet. Criminal enterprises filled the void with gambling. They made money. They proved the business model. When gambling became legal, the infrastructure was already built. The Mob had already trained a generation of casino operators. Legal casinos just inherited the system they invented.
