> is just proximity. What I didn't emphasize enough is that the high school teen years is really _just_ proximity. But adult employment adds more than proximi

> is just proximity. What I didn't emphasize enough is that the high school teen years is really _just_ proximity. But adult employment adds more than proximity because you choose what kind of place to work at. (E.g. you studied 4 years for Computer Science so you end up at work alongside other programmers.) Many times, people undo the proximity effect by literally relocating across the country to find a job that fits their criteria. Kids don't really choose their high school (setting aside isolated situations like magnet schools.) The randomization of interests caused by clustering kids into high-school district maps basically guarantees shallow childhood friendships that won't last into late adulthood.