The four ages of sand January 10, 2013 General http://www.douglasadams.se/stuff/sand.html Ed Dowding Ed Dowding is a systems-thinking entrepreneur with over 20 years of experience using technology to tackle existential risks and promote sustainability. https://www.linkedin.com/in/eddowding/ Post navigation PreviousPrevious post:The Generals by Shel SilversteinNext Next post:The world is on track for disaster. Who wants to buy a farm? Leave a Reply Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.
