I was recently directed to this older thread by the daily-ish e-mail. I tracked down something closer to the original source of Starhawk's evolution of the 3rd ethic:
I found her article inspiring and think it is really worth reading in its entirety. In it she says:
"The three ethics work together. We cannot truly care for the earth unless we take into account the people and the long term impact of our interventions. Ecological solutions that ignore issues of justice are doomed to fail. And we cannot care for the people if we don't take into account the life-support systems of the earth that sustain us all. Social and economic justice movements that ignore the environmental constraints and ecological realities cannot truly improve peoples' lives. To care for the future, we must share the surplus we create and limit our consumption. When we bring people care and earth care together with an eye to future generations, we create a synergy that has immense power for healing and regeneration. Climate change can be seen as a symptom of myriad dysfunctional relationships. Our technology, our energy systems, economic systems and food growing systems, our whole way of life are in warped relationship to the greater realities around us. To avoid ultimate climate catastrophe, we must heal some core relationships, with place, with food and soil, with community [Upgeya: and I would add, with ourselves]. When we do, we can wean ourselves off stuff as a filler for the emptiness within, step out of the competitive ballpark and into the singing garden."
My understanding of the three ethics is that they arise from a single ethic, the Life Ethic: living organisms are not only means (to meeting our needs), but also ends, having intrinsic worth, in themselves. In addition to their instrumental value to humans and other living organisms, they have an intrinsic worth.