The pre-verbal awareness that all of nature, including humanity, is a single, interdependent entity is a powerful motivator for change. The fact that the power of the awareness is emotional rather than intellectual makes it a natural vehicle for spiritual expression. So, rather than dismiss the spiritual interpretation as being simple woolly-minded romanticism, we should instead recognize and try to harness its power. The philosophical path does not have to lead back to the trees -- in fact it can't, given our current situation with technology and population. Unfortunately, as the author of the article hints, rational thought tends to be a poor motivator. So we need to use the unscientific spiritual perception to galvanize support for the rational changes that are needed to bring about some improved balance in the biosphere.
For me, the bridge philosophy (in the sense that it incorporates both the right-brain spiritual sense and left-brain rationalism) is Deep Ecology. The other possible candidate I've been exploring, anarcho-primitivism, is much less effective. While it has much of value to say about where we came from and how we got here, its prescriptions are useless insofar as they recommend a voluntary renouncement of technology -- which just ain't gonna happen in this or any other lifetime.
Again, for those rooted in the Enlightenment worldview but with some curiosity about how we got to this sorry state, I would recommend Charles Eisenstein's remarkable online book
The Ascent of Humanity.