I was thinking 30 myself. Remember, never trust anybody under 30.
All this talk about age really does matter.
Drinking age went to 18 in Montana back in the day. It spawned an entire generation of raging alcoholics and drunk driving related deaths until it was raised to 21 again.
Y’know what would change the culture almost at once?
Raise the age for going to college as an on campus resident student to 30.
I blew off my first year of college at 18.
Let my draft deferment lapse.
Got drafted, married, two combat tours in VN.
Stayed in the Army and went to night school for 10 years.
Went to college as a resident student (via VA and Army bootstrap program) and got a degree in one year. Carried semester loads of 21 hours. Worked my tail off. Enjoyed wonderful family time. Behaved like an adult for a change, studied, took notes, did the readings, never missed a single lecture. Graduated Summa 4.0 when an A grade meant something.
The most exciting moment involving a student activity outside of class came when I was walking to a lecture and a woman student decided to enhance the campus “streaking” experience. She undressed at the crosswalk and ran off singing in quite a lovely voice. Although I never saw her face, I remember she was very likely the most beautiful woman in the world.
At age 30, I learned to value a college education even more than the streaking and other campus activities.