Interesting C&P plus link:
This, however, lead to Lovelock perceiving the earth as a complete whole. While on a walk in the countryside in England, Lovelock described his hypothesis to his neighbor William Golding (author of Lord of the Flies), and asked advice concerning a suitable name for it. The result: 'Gaia'?after the Greek goddess who drew the living world forth from Chaos?was chosen.
Lovelock acknowledges that he was not the first to conceive the idea of biological regulation. Scientist Alfred Redfield put forward the hypothesis as early as 1958, when he theorized that the chemical composition of the atmosphere and oceans was biologically controlled. While other scientists had also considered the same hypothesis, the idea never gained much audience and even the papers co-authored by Lovelock and Lyn Margullis largely went unnoticed until Lovelock's book, Gaia: A New Look at Life on Earth, caught attention. In the book Lovelock states that humankind is part of an overall complex biosphere organism.
http://www.lifepositive.com/Mind/philosophy/gaia-hypothesis/gaia-hypothesis.html