“I have told you that the spirits of darkness are going to inspire their human hosts, in whom they will be dwelling, to find a vaccine that will drive all inclination toward spirituality out of people’s souls when they are still very young, and this will happen in a roundabout way through the living body. Today, bodies are vaccinated against one thing and another; in future, children will be vaccinated with a substance which it will certainly be possible to produce, and this will make them immune, so that they do not develop foolish inclinations connected with spiritual life – ‘foolish’ here, or course, in the eyes of materialists. . . ."
https://wn.rsarchive.org/Lectures/GA177/English/RSP1993/FalDar_index.html
Steiner was a nut. He believed a lot of whacky things. However, he also had quite a few good ideas when it comes to the education of little ones... mainly, a heavy focus on imagination, art and play, as well as the importance of nature and rhythm.