A lottery is a form of gambling that involves drawing numbers at random for a prize. Some governments outlaw lotteries, while others endorse them and organize state or national games. Governments regulate lottery activities to some extent, prohibiting sales to minors and requiring vendors to be licensed. In addition to the classic forms of gambling-related lotteries, many use lottery drawings for other purposes such as military conscription, commercial promotions in which property or goods are given away by a random procedure, and selection of jury members from lists of registered voters.
In the Low Countries of the 15th century, towns held public lotteries to raise funds for town fortifications and for poor relief. During the same period, the casting of lots was a popular dinner entertainment. A lottery was also used by emperors such as Augustus Caesar to give away property and slaves during Saturnalian feasts.
In the 17th and 18th centuries, lotteries played a large role in financing private and public ventures in colonial America. For example, Benjamin Franklin used a lottery to fund the construction of cannons for his defense of Philadelphia against the British. Today, state and national lotteries continue to attract widespread public support and are a major source of revenue for many state governments. However, critics argue that lottery programs promote addictive gambling behavior and impose a regressive tax on lower-income individuals. They also contend that states are facing an inherent conflict between the desire to increase revenues and the obligation to protect the public welfare.