I cannot remember any other state where drinking alcohol is illegal until 21 except USA.
Usually it's 18.
It use to be 18, I got in under the belt and I think that Jan. it went up to 21. That would have been 1980 when it kicked in. I'm not a drinker, but I tried it our as a passing of rights so to speak.
It does save lives as many 18,19,20 yr olds don't know how to drink responsibly or like an adult should. But If I can die for my country and be put in prison for a crime I should be able to have a beer or wine when ever the hell I want.
Many places the children have wine with dinner instead of milk, water, soda or juice.