Title: Was Paul Ehrlich right?

Synopsis: Stanford University ecologist Paul Ehrlich claimed that unless a radical change happens before of the turn of the millennium, our planet could probably not be saved. But his controversial predictions have often proven to be wrong. Paradoxically, we do not have a conclusive result, something we can all rely upon, which could orient us regarding the most central sustainability issue. Can Polyscopic Modeling help? Consider this issue from various angles, scan the main sources and try to condense the available evidence into a crisp and clear statement, as much as possible.