Most of our common social institutions do double-duty, triple-duty, or more; they serve many functions at once. While this makes functional sense, it also complicates the task of inferring their functions. School is a good example. Some oft-mentioned functions:
babysit – keep kids safe via less adult effort
match – help kids find compatible mates/friends
practice – practice specific skills, habits
3 Rs – practice reading, ‘riting, ‘rithmatic
be like us – adopt our styles of talk, dress, music, etc.
learn to learn – practice practicing new skills
remember – remember specific facts, claims
dogma – remember approved social views
norms – internalize behaviors, standards
mark – show that students better than others
sort – rank by ability, loyalty, personality, support
legitimize – accept non-school rank via school rank
submit – practice gracious obedience, ranking
stiffen – strength self-control to follow norms
harden – practice working long, hard, on cue
soften – practice accepting new local norms, ranks
entrench – keep the system going, grow it if possible
impress – make a local society look good to outsiders
In the face of such complexity, I prefer to
Collect stylized facts, i.e., simple patterns of behavior that might be clues to help distinguish theories.
Instead of seeking ad hoc explanations for each clue, seek a simple package of assumptions that simultaneously explain as many clues as possible with as few assumptions as possible.
So I hereby declare my newfound interest in such clues. What ya got?
"This will remain true as long as you and your parents are highly genetically related..."
This genetic reductionism is rubbish. Don't adoptive parents and step-parents act the same way? And aren't siblings, who share MORE genes with each other than they do with their parents, display LESS tolerance for bad behaviour than do parents?
"But seniors in high school have to ask permission just as much as kindergarteners do."
Not universally, agnostic -- my son is in a (public) middle school and is free to go anywhere within five blocks of the school on his lunch break. When I was in high school several of the public schools near me had "open campuses."