Question: why did they change the drinking age to 21?
Answer: During the late 1960s and 1970s, nearly all states lowered the drinking age to 18. ... 1984-2014: National drinking age raised to 21: In response to the drunk driving epidemic of the 1970s, President Ronald Reagan passed the Minimum Drinking Age Act in July 1984, a law that mandated states increase the drinking age to 21.