These days the topic falls under "Secure attachment" as part of "Attachment theory." The phrase "unconditional love" proved thorny and IMHO ill-judged, misleading.
My experience raising children is that you're golden if the child knows you're on their side, putting their interests above your own. Helping them learn, not putting any moral puzzles in front of them that they can't easily solve, together with lots of misbehavior play so they can learn boundaries without actually misbehaving.
https://www.verywellmind.com/what-is-attachment-theory-27953...
My experience raising children is that you're golden if the child knows you're on their side, putting their interests above your own. Helping them learn, not putting any moral puzzles in front of them that they can't easily solve, together with lots of misbehavior play so they can learn boundaries without actually misbehaving.
"Unconditional love" was just bad philosophy.