ABSTRACT
Just as there are many possible variations of the wrong fork of the crossroads, there are also many along the right fork. We are not so pretentious that we think that we alone have the right answers. The chapters of this volume are meant to be signposts, not detailed itineraries, on the road to sustainability, equity and liveability. The authors hope that they will be of some value in bringing humankind on to the right fork. Considering the diversity of cultural and geographical backgrounds from which the authors have come to this enterprise, it is not surprising that there are points of disagreement between them. Most remarkable, however, is how broad the areas are on which there is agreement. This is a positive sign for the future.
