C. S. Lewis wrote about peer orientation? Certainly not by that name.
But recently, as part of my C. S. Lewis retrospective, I came upon a passage in Mere Christianity that immediately brought to mind the epidemic of children taking their culture and direction from peers, rather than from parents or other adults, which has been going on in our society for at least three generations.
What Lewis was actually writing about was the central tenet of Christianity: what it is and what it is not.
The central Christian belief is that Christ's death has somehow put us right with God and given us a fresh start. Theories as to how it did that are another matter. A good many different theories have been held as to how it works; what all Christians are agreed on is that it does work.
As part of his explanation of one of those theories, Lewis likens God's work in us—enabling us to repent, reason, and love—to a teacher who helps a child learn to write by holding the child's hand and forming the letters with him. Later he writes [emphasis mine],
I have heard some people complain that if Jesus was God as well as man, then His sufferings and death lose all value in their eyes, "because it must have been so easy for Him." Others may (very rightly) rebuke the ingratitude and ungraciousness of this objection; what staggers me is the misunderstanding it betrays. In one sense, of course, those who make it are right. They have even understated their own case. The perfect submission, the perfect suffering, the perfect death were not only easier to Jesus because He was God, but were possible only because He was God. But surely that is a very odd reason for not accepting them? The teacher is able to form the letters for the child because the teacher is grown-up and knows how to write. That, of course, makes it easier for the teacher; and only because it is easier for him can he help the child. If [the child] rejected him because "it’s easy for grown-ups" and waited to learn writing from another child who could not write ... (and so had no "unfair" advantage), [the student] would not get on very quickly. If I am drowning in a rapid river, a man who still has one foot on the bank may give me a hand which saves my life. Ought I to shout back (between my gasps) "No, it’s not fair! You have an advantage! You’re keeping one foot on the bank"? That advantage—call it "unfair" if you like—is the only reason why he can be of any use to me. To what will you look for help if you will not look to that which is stronger than yourself?
Rejecting the help of those who are stronger than ourselves is what we have been doing for decades. We turn for help and advice—for the very shaping of our lives—to our peers, and we not only tolerate, but encourage, the same in our children. Unlike all generations before the 20th century, we do not acquire our culture from our parents, but from agemates who have no more experience, knowledge, and wisdom than we ourseves. We ignore history, throwing out all mankind has learned from the beginning of human life on earth, on the grounds that the benighted, ignorant savages that came before us have nothing to say to our modern world. The latest TED talk or Huffington Post article gets more respect and attention than the wisest writings of the past.
No wonder we're in a mess.