We are kind of there, and we have to now not romanticize about 'going back' but integrate scientific discovery with spiritual insights. Permaculture is a good example of this. It is true is it not that Indigenous peoples used/use 'polyculture', and yet it is also part of the world we are immersed in (thanks to the likes of Bill Mollison) the scientific discoveries which were unknown way back when. Having said that, in Jeremy Narby's book The Cosmic Serpent, that I am re-reading---he sees a correlation between the experiences inspired by Ayahuasca the Indigenous healers, and others, have --of serpents, and various visions, and 'communications with spirits' and with scientific discoveries of DNA (which resembles a twining double serpent!), and amazingly Crick claims it was the psychedelic LSD which helped him with the insight of how DNA forms: Now I am not exactly saying that thus the Indigenous peoples would be able to do the mathematical calculations, and other scientific experiments, but it is VERY important I feel to see this correlationship, and also remember that scientists dismiss this part of it--the visionary part too, and so what Narby is trying to achive is bring all of this to the table--as it were. NOT just dismiss 'spirit talk' 'hallucination talk' because they have been stung by 'superstitious nonesense' and/or have the image of old men in shacks in the jungle doing mumbo jumbo. To me real exploration is being interested in such correlation and what they may mean, and not jump to conclusions because of prejudice or fear of 'chaos'. I feel personally an urgency because of the ongoing assault on nature. We can maybe start with Rome, and follow this desrtification, and total disrespect for natural species and peoples who do not conform to this insane march to destruction. A big part OF this march is the suppression OF exploration of ideas.