Comment by ikr678

Low income families skew nonconventional/single parent which fractures the extended family unit, less likely to have uncles etc around to step in as a mentor.

Smaller family sizes over the previous generation have also contributed to this.

I have 9 uncles in total (including all my aunts' partners). My kid has one.

Also, if you grow up in a household that rents (moves often or is surrounded by neighbours who move often), you are less likely to have long term reliable neighbours available to form adult-child relationships with.