What are the historical reasons for which 21 is the drinking age in the US?
user
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.
assistant
Which President signed that bill into law?
user
This was signed into law by President Ronald Reagan on July 17, 1984. Please let me know if there are any other questions that you have regarding the Drinking age in the United States.
assistant
Do you agree with this law or do you think it would be better to lower the minimum drinking age to 18, as many other countries do?
user