Mass Extinction!

[Anomalocaris]

Sustainability in the long run is ultimately impossible simply because life sustaining conditions on earth will not last forever with or without us. Sustainability in the short run approaches good policy, but is not the final objective, since we must come to terms with the inevitable need to everntually abandon this planet. So we should keep in mind what the final objective of short run effort at sustainability really is, and not make sustainability itself a quesi-religious doctrine, and thereby foreclose on nonsustainable efforts that also menifestly contributes to the final objective.