Comment by nancyminusone
Comment by nancyminusone a day ago
My answer is "a generation". There's so many ideas and behaviors that don't persist between generations that it seems as natural of a division as you could have.
The median age of new mothers is 27 around here, which seems about right.
A generation is usually considered to be ~20 years, which is less than 14+14, not that I'm complaining.