This is what he said and what John and Nancy Todd said. It is adamant that we read and study the first four chapters of the Designer’s Manual religiously. It is all in there.
The Practice of Permaculture
As stated by Bill Mollison in Permaculture: A Designer’s Manual, in order for the long-term consequences of our actions to promote sustainability for future generations, we need to use “species that are native to our area or those naturalized species known to be beneficial; plan for small‑scale, energy‑efficient intensive systems rather than large‑scale, energy‑consuming extensive systems; be diverse, polycultural; increase the sum of yields: look at the total yield of the system provided by annuals, perennials, crops, trees and animals, also regard energy saved as a yield; use low energy environmental (solar, wind and water) and biological (plant and animal) systems to conserve and generate energy; bring food growing back into the towns and cities; assist people to become self‑reliant and promote community responsibility; reafforest the earth and restore fertility to the soil; use everything at its optimum level and recycle so‑called wastes of any kind; see solutions, not problems.”
“We must create designs for human settlements that incorporate principles inherent in the natural world in order to sustain human populations over a long span of time.” — Nancy and John Todd