/lit/ - Literature

Sex, Ecology, Spirituality (pic very related) came out in 1995, so a bit more than 20 years ago but I hope it still counts
It introduces the Twenty Tenets, which are an expanded view of holons. The list of Tenets isn't sufficient for a full understanding - you need to read chapter 3 of the book to see the explanatory text, but here is the list: https://www.integralworld.net/20tenets.html

For reference: a holon is a part of a whole, as well as a whole made of parts.