SALT in the Garden

While working in the garden this weekend, I listened to several SALT lectures. All were mind expanding--especially Longman's:

• Phillip Longman, The Depopulation Problem
• Ken Dychtwald, The Consequences of Human Life Extension
• Rusty Schweickart, The Asteroid Threat Over the next 100,000 years
  
• Roger Kennedy, The Political History of North America from 25,000 BC to 12,000 AD
• James P. Carse, Religous War in Light of the Infinite Game
• Stuart Brand, Cities and Time