MADD managed to force the 21-year drinking age nationwide by having the Congress refuse to provide Highway money to any State that didn't do that.

That was a pretty impressive feat!

We are the only nation in the entire world which has a 21-year old drinking age.  The Muslims don't allow it at all, and the rest rely on the social mores to keep their drunks in line.  

Only the United States is incapable of raising responsible drinkers.