What should the drinking age be?

[100% pro-life no matter what]

In theory, I believe alcohol should be illegal.  While some people can use alcohol responsibly, there's no question society would be better if alcohol were to disappear.  In practice, however, the revolt that banning alcohol would cause isn't worth it.  But, conditional on it being legal, I think having it at 21 instead of 18 actually does more harm than good. 

Plus, I think young adults being treated like children for too long has led to a lack of maturity.  The fact that people are waiting until their late 20s or 30s to get married and have kids is a problem (and I recognize that, being 25 and unmarried, I'm not helping the statistics myself).