I cannot take any credit for the paragraph you reference, it is from George Miller's early Mad Max, but the sentiment spoken of the abject failure of world leaders (with very rare exceptions) to build (or even speak of) a sustainable healthy world is what we face today. Joseph Campbell's "Power of Myth" is, indeed, powerful stuff, and his counterpart in the interviews, Bill Moyers, is a national treasure - would our "leaders" have one tenth the wisdom they speak.
"Growth" and "development" touted by the vulture capitalists and charlatan politician whores is what they build - their house of straw - a world being torn apart by greed and self-interest - profits above all else, exept war and racism - with the lowest common denominator the goal. Exploitation to extinction, poisoning the planet for a buck, and the war-machine(s) are holy, with Mother Earth repeatedly raped........and there is little light at the end of the tunnel, or leaders with the wisdom or integrity to do anything but talk and talk and talk and do little but be complicit and empower the madness.
Campbell mentions Cheif Seattle in his talks and reverence for the Earth - Gaia. This quote is inspired by the Chief but written by Ted Perry - I think it says a lot.
"If all the beasts were gone, we would die from a great loneliness of spirit, for whatever happens to the beast, soon happens to us. All things are connected. Whatever befalls the Earth befalls the children of Earth. Man did not create the web of life - he is merely a strand in it. Whatever he does to the web, he does to himself"