The first short excerpt is from Mark's Speech at the October 2014 TED Global conference in RiodeJaneiro, Brazil in which he addresses how indigenous cultures, isolated and uncontacted tribes, are disappearing - they are the most endangered species in the Amazon Rainforest, not the jaguar nor the eagle. The second excerpt is from Mark's August 2006 speech as part of the Authors@Google series in which he emphasizes his view that protecting the earth is good for us spiritually.

• Published on Dec 1, 2014