Fundamental Questions include:

• Ethical/ecological proposition:
  • What is the philosophical foundation?
  • What is the underlying value system?
  • What is our motivation?
• Quantitative definition:
  • What 'system' are we looking at?
  • What are the factors we use to describe the system's sustainability?
  • Is there consistency with the ethical/ecological proposition?
• Operationalization:
  • How are we in this world?
  • What role do we play in the Earth system?