Daniel Schmachtenberger is one of my favourite thinkers.  I just wish he would write the book I keep meaning to write, because he would do a much better job of it than I would.  Basically, Daniel is E.A.R.T.H.+, and if you haven't heard of him, it's time you did.  The range of his thought is breathtaking, but he is also talking about the things that matter, such as how we move forward sustainably, peacefully and equitably, without forgetting all the other beings on the planet.