Sustainable

A practice is sustainable if it can be continued indefinitely within a system.

Indefinitely? Without limit, except as posed by external events truly beyond the control of those performing the practice that change the system. Resilience describes the ability to withstand external changes to the system but relies on changes not exceeding critical limits.

Is there a limit beyond which it is not possible to continue? Assuming planet earth as the system, the sun is expected to put an upper limit on any biosphere after several billion years. Other events beyond our control that make life impossible on this planet may or may not occur. For purposes of this discussion sustainable civilization is able to continue on this planet while the sun provides a suitable environment i.e., for billions of years.

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Temporarily more unsustainable to get to the right kind of trajectory?

Nick Bostrom proposed that it was not so clear that sustainability is the most appropriate frame and expressed that he thinks we need to keep the rocket engines on until we've reached escape velocity, thus we may need to go deeper into a phase of unsustainability first in order to get to a different kind of sustainability at the other end (say rapidly outwardly expanding but inwardly sustainable multi-galaxy super-high-tech civilization with posthuman population size maybe billions of times greater than now...!). He thought the current focus should be not be so much to get into the right kind of state but to get onto the right kind of trajectory.

It may well be possible that temporary unsustainability can lead to better sustainability. It seems much wiser, though, to enter such a path only as a civilization that can be reasonably certain that such a better sustainability will be reached and has an alternative. Without that the current path seems foolishly dangerous.

The existence of intelligent individuals (be that machines, human generations or other types of being) in the future provides a worthwhile goal for any civilization. We should choose the wisest path to reach it. Dipping temporarily into unsustainability could be done when it is less risky. Right now it seems more important to find ways to achieve conditions that are necessary to allow civilizations to continue. That includes sustainable practices.

Links and other definitions

• The Brundtland comission's report concluded that Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs. It contains within it two key concepts:
  • the concept of 'needs', in particular the essential needs of the world's poor, to which overriding priority should be given; and
  • the idea of limitations imposed by the state of technology and social organization on the environment's ability to meet present and future needs.

• John R. Ehrenfeld of the International Society for Industrial Ecology bases his book "Sustainability by Design" (ISBN-13: 978-0300137491) upon the definition that sustainability is the possibility that humans and other life will flourish on Earth forever.

• Mindfully.org has a collection of links regarding sustainability

• US Environmental Protection Agency EPA defines Sustainability as “meeting the needs of the present without compromising the ability of future generations to meet their own needs.”

• Konrad Ott advocates the case for strong sustainability

• Wikipedia's articles on sustain and sustainability discuss various concepts and understandings of the term.

• for reference: the perspective on sustainable civilization discussed on the milliongeneration.org pages