Well, It isn't everywhere. But that isn't the point of the question, The legal drinking age is 21,In short, The US ended up with a national minimum age of 21 because of the National Minimum Drinking Age Act of 1984. This law basically told states that they had to enact a minimum drinking age of 21 or lose up to ten percent of their federal highway funding.That is some serious money. Contrary to popular belief, it isn't because of you being "More mature" at the age of 21. Adding more to the subject :From old English law (That stated 21 was adult age), 21 was the age at which a person could, among other things, vote and become a knight. Since a person was an official adult at age 21, it seemed to make sense that they could drink then, too.
8 months ago
Last edited at 11:44AM on 4/5/2013
The voting age used to be 21 as well. I think it was just a standardized age. The voting age dropped to 18 in 1971 as a result of the Vietnam War. Then, as Bambino mentioned, the drinking age became federally standardized in the 80's. But it was already mostly 21 anyways.