The following quotation is from C. S. Lewis's Studies in Words. It's not a book aimed at the hoi polloi—those of us without a strong background in classical literature, Latin, Greek, French, and whatever else scholars were supposed to know in his day. So do not even try to understand it all, stripped as it is of its context and what has been said on previous pages. It's not hard to follow the point of the sentence I have bolded, however.
Distinct from this, so far as I can see, is the use of communis sensus as the name of a social virtue. Communis (open, unbarred, to be shared) can mean friendly, affable, sympathetic. Hence communis sensus is the quality of the "good mixer," courtesy, clubbableness, even fellow-feeling. Quintilian says it is better to send a boy to school than to have a private tutor for him at home; for if he is kept away from the herd (congressus) how will he ever learn that sensus which we call Communis? (p. 146)
If you want to poke the bear at any gathering of homeschoolers, ask the question, "But what about socialization?"
We have to be careful because this can be an innocent, serious inquiry that deserves a serious answer. The above is not suggested as the best way to respond, no matter how tempting. But we get so very, very tired of the question, perhaps in the same way that parents of large families get tired of being asked, "Haven't you figured out what causes that?" Large families who homeschool get both, of course.
I'll spare you the numerous studies and writings—and comics—that make the point that homeschooling is an excellent vehicle for helping children learn to get along well with others and to engage wisely with society in general. You can Google that for yourself.
But Quintilian (c. 35 - c. 100 AD) proves that the question is nearly as old as the Roman hills. Then again, he was a teacher with his own public school, and a lawyer as well, so perhaps he was a bit biased.
