The Gaia Hypothesis of James Lovelock [and Lynn Margulis] puts forward a scientific view of the living Earth, which in one respect is modern, empherical, scientific, in another respect re-awakens an ancient archetype, which in fact is so clearly suggested by the very name of the hypothesis, Gaia, the Greek name for Mother Earth.
Fundamentally not to waste energy. If we were all to reduce our demands for energy, it would make an enormous amount of difference.