It seems curious that we know so much about sheep, so little about those animals which outweigh them per hectare by factors of ten or a hundred times… - Bill Mollison

… the value of land must, in the future, be assessed on its yield of potable water. Those property-owners with a constant source of pure water already have an economically-valuable "product" from their land, and need look no further for a source of income.

It is my belief that we have two responsibilities to pursue: Primarily, it is to get our house and garden, our place of living, in order, so that it supports us; Secondarily, it is to limit our population on earth, or we ourselves become the final plague. Both these duties are intimately connected, as stable regions create stable populations. If we do not get our cities, homes, and gardens in order, so that they feed and shelter us, we must lay waste to all other natural systems. Thus, truly responsible conservationists have gardens…

As non-scientists, most gardeners deprived of atomic-ray spectrometers, a battery of reagents, and a few million research dollars must look to signs of health such as the birds, reptiles, worms, and plants of their garden-farm. For myself, in a truly natural garden I have come to expect to see, hear, and find evidence of abundant vertebrate life. This, and this alone, assures me that invertebrates still thrive there. I know of many farms where neither birds nor worms exist, and I suspect that their products are dangerous to all life forms.