[sperry]

The Federal gov't has no right to create drinking age laws. They just cut federal highway funding to states that refuse to enforce a 21 yr old drinking law. The primary reason for this is because half the deaths on the highway are alcohol related, and it's the primary cause of death for 16-21 year olds.

So, you have the right to go to war at age 18 but not the right to drink at 18 because it's been consistently shown that both are likely to kill you. The difference is only that dying in war is generally useful, while dying drunk behind the wheel serves no cause.