The Clark Lecture in the Humanities promotes “public discussion on the natural sciences, the history of Oregon, and the interface between science and social and cultural affairs.” The 2007-08 Clark Lecturer was Stanford biology and environmental studies professor Stephen Schneider. Schneider is the founder and editor of the interdisciplinary journal, Climatic Change. He is editor-in-chief of the Encyclopedia of Climate and Weather and author of The Genesis Strategy: Climate and Global Survival; The Coevolution of Climate and Life; Global Warming: Are We Entering the Greenhouse Century? and Laboratory Earth: The Planetary Gamble We Can’t Afford to Lose. Stephen Schneider talked about how much more could be done to substantially reduce the magnitude of the risks associated with global warming if only we can summon the political will to take decisive action—soon.