User blog comment:Mrdaimion/Serious Sam - Issue 2 - Alcohol/@comment-1871576-20120313002655/@comment-1874924-20120313003350

My understanding is that the higher limit was set mainly because of who the peer group is. With the limit at 21, it's common knowledge that 19- and 20-year-olds will have easy access to alcohol. By setting the age limit at 18, some kids as young as 14 (i.e. HS freshmen) would likewise have easy access to alcohol. Do you really think that's a good idea?

Some states used to allow 18-year-olds to drink, but restricted them to the weaker grades of beer. Those states went to the uniform 21-year age limit under the threat of losing their federal highway funding.