Robert Hart summarized his vision of harmonious living on Earth in the following quote,
Obviously, few of us are in a position to restore the forests.. But tens of millions of us have gardens, or access to open spaces such as industrial wastelands, where trees can be planted. and if full advantage can be taken of the potentialities that are available even in heavily built up areas, new ‘city forests’ can arise…
He identified 7 layers to a successful and productive forest garden: