This exciting volume brings together an international gathering of scientists and philosophers concerned with the fate of our planet. Based on a conference held in Perugia, Italy, this collection of papers and symposia confirms Heisenberg's saying that "real science" is made in the conversations of scientists. In it, we see what is perhaps the most important scientific idea of the twentieth century taking shape before our eyes. Contributors include: James Lovelock and Lynn Margulis, Francisco Varela, Evan Thompson, Arthur Zajonc, Wes Jackson, John Todd and Nancy Jack Todd, Susan Oyama, Gianluca Bocchi, and Mauro Ceruti.