What an amazing man and great storyteller. Spent 22 years walking an sailing around the world. He started when he saw 1/2 million gallons of oil empty into San Francisco Bay he swore off using a vehicle or anything that required oil. He spent 17 of those years he didn't say a word. He stopped speaking so that he could stop arguing. He felt it could help him learn to listen. Although he reevaluated his vow of silence on his birthday every year. That lasted 17 years during which he earned a BA, MA and PHD. It took him 7 yrs and a day to walk across the country. The best thing, he says, is learning to listen. What started him talking again was when he realized that we, people and how we treat each other is truly part of our environment. He became a UN Ambassador (though i'm not sure what kind). He felt that he had a responsibility to help change others and he felt it was the only way he could have significant impact. We have to leave behind our security and go to the place we must go. We have to do something now, we have to change now.