Chapman Conferences on the Gaia hypothesis

There have been two Chapman Conferences on the Gaia hypothesis, sponsored by the American Geophysical Union. The first was held in San Diego, California in 1988, and the second in Valencia, Spain in 2000. The companion book to the first conference is called Scientists on Gaia and was edited by Stephen Schneider and Penelope Boston. The companion book to the second conference is called Scientists Debate Gaia: The Next Century and was edited by Stephen Schneider, James R. Miller, Eileen Crist, and Penelope Boston.