Sustainability line theory tells us that sustainability varies from 0 to 1 or from full unsustainability to full sustainability. This thinking can be expanded step by step to show the following: i) The location of full unsustainability paradigms and of full sustainability paradigms; ii) The possible contractions and expansions of sustainability paradigms; iii) The possible contractions and expansions of unsustainability paradigms; iv) The nature of the sustainability problem separating full sustainability paradigms and full unsustainability paradigms; v) The nature of the unsustainability paradigm zone separating full sustainability paradigm and full unsustainability paradigms; and vi) The expected expansion of unsustainability paradigms and of full sustainability paradigms once they are in place. The overall goal of this paper is to show how this step-by-step expansion of the sustainability line idea works as well as to highlight the relevant implications at each step.