http://nooventures.edublogs.org/2007-04-12-the-limits-to-the-complexity-of-social-systems-by-duane-elgin-and-robert-a-bushnell/ Mind Ventures in the Quest for a Life-Sustaining Civilization Design Thu, 21 Aug 2008 23:26:00 +0000 http://wordpress.org/?v=2.5.1