米国の21歳の飲酒年齢は、1984年の国家最低飲酒年齢法の結果です。この法律は、全国で21歳で最低飲酒年齢を確立し、アルコール関連の交通致死量の増加に関する懸念に応じて制定されました。若者。

法律が制定される前に、最低飲酒年齢は州ごとに変化し、一部の州の飲酒年齢は18と低い。。

交通致死の減少に加えて、この法律は、若者によるアルコールの全体的な消費を減らし、アルコール関連の負傷や犯罪の数を減らすように設計されました。法律は、それが個人の自由に侵害されていると信じていた人からの反対を受けましたが、それはその後支持され、米国の最低飲酒年齢として存在し続けています。
The drinking age of 21 in the United States is a result of the National Minimum Drinking Age Act of 1984. This law established the minimum drinking age at 21 nationwide and was enacted in response to concerns about the increasing number of alcohol-related traffic fatalities among young people.

Before the law was enacted, the minimum drinking age varied from state to state, with some states having a minimum drinking age as low as 18. However, studies showed that the higher the drinking age, the lower the number of alcohol-related traffic fatalities.

In addition to reducing traffic fatalities, the law was also designed to decrease the overall consumption of alcohol by young people, as well as reduce the number of alcohol-related injuries and crimes. The law was met with opposition from some who believed that it infringed on individual freedom, but it has since been upheld and remains in place as the minimum drinking age in the United States.