If a person can go to war, shouldn't he or she be able to have a beer?

"Many rights have different ages of initiation. A person can obtain a hunting license at age 12, driver’s license at age 16, vote and serve in the military at 18, serve in the U.S. House of Representatives at age 25 and in the U.S. Senate at age 30 and run for President at age 35. Other rights we regulate include the sale and use of tobacco and legal consent for sexual intercourse and marriage. The minimum age of initiation is based on the specific behavior involved and must take into account the dangers and benefits of that behavior at a given age." (Wagenaar, A.C., & Toomey, T.L. (2002). Effects of minimum drinking age laws: Review and analyses of the literature from 1960 to 2000. Journal of Studies on Alcohol, Supplement 14, 206-225.)