re: Can anyone logically defend the 21 drinking age law?

I think the age of majority in the US should be 21 for everything...including military service. That's also including drinking, gambling, porn/adult entertainment, contracts, recreational marijuana consumption, driving(only 21 if job related...hazmat etc.), and voting. I would like to see a mandatory service provision for all US citizens prior to the age of 21. In short, you would have to volunteer your time with an approved national relief organization (Salvation Army, Habitat for Humanity, SPCA etc.), join the national guard, or pay a tax in order to skip service. We are not talking immense amounts of time. Additionally, those that do not participate in cannot receive government benefits EVER or run for public office (which should NEVER count as public service as described above). I realize the drinking and the weed will be hard to enforce, but at least it would make everything consistent. My thoughts on the national guard being from 18-21 is to limit the issues concerning our active duty personnel, to have a better trained and more mature military, and to give our states a larger national guard to assist with disasters at the state level. The buyout phase would be per year. You want to buy out one year, that's ten grand, two would be 100k, and all three would be a cool million. I wouldn't want these programs to interfere with advancing an education so the one weekend per month/plus two weeks consecutive weeks per year would apply. I figure if people have to put some elbow grease into making the country great they may think more highly of what we have. Just my .02.