This is a fascinating topic for me too - precisely because I don't think the answers are easy. I've found that the RIE approach to caregiving is a close fit with the ideas of voluntaryism, you might find that interesting too. I wrote a short introduction here: https://steemit.com/peaceful/@bitbutter/less-stressful-more-respectful-rie-caregiving
RE: Parenting for Voluntaryists