There was a discussion in my Intro to Women's Studies class about the current state of young men (between the ages of 18 and 27) in the United States. We were discussing how there seems to be a delay into adulthood, for instance, a few decades back men in this age range were already more likely to already have a job and have a family. These days, young men within this age range are still transitioning into adulthood.
I´m not sure I would define adulthood by having a job and having a family.
I´m also not sure how many decades are "a few decades".
If comparing my (generalizing) observations of young men today with the young men roughly three decades ago (i.e. when I was a young man), I find the following phenomena significant:
1. Young men today move out of their parents´ home later than we did (which may either indicate that they don´t see living on their own as a value in the way we did) or to changed economic conditions (or a combination of both).
2. They are heading straightforward to getting a decent job much more than we did, who often went to university for countless semesters, travelled, and enjoyed that "life in all its seriousness" hadn´t yet begun.
3. The desire for a committed partnership, marriage, family, kids, property seems to kick in much earlier than back then, when we tended to feel comfortable with having all opportunities and plenty of time to make up our minds.
Summary: In my impression young men today know much earlier than we did what they want, what their goals in life are, and they pursue these goals. From conversations with my students I get the impression that staying in their parents house longer is also just a pragmatic decision that helps them pursuing these goals with greater effectivity. Everything is being cared for, mom is doing the laundry, and thus they can concentrate on building the fundaments for their life plan.
Note that these are
my observations and interpretations (and hence probably suffer from distortions induced by subjectivity), and that they are not about the USA but about Germany (Europe).