"Bringing Humanism and Science to Bear on the Challenges of Life, Wisdom, and Sustainability," State of the University Address, October 29, 2004
"Managing Fear: Finding the Energy to Move Forward," International Low-Carbon Development Forum, April 16, 2010
"The Z3 Goal: Unattainable and Indispensable," International Low-Carbon Development Forum April 22, 2011
"Fractal Variety and Contrast: A Low-Carbon Fuel for Inspiration and Innovation," International Low-Carbon Development Forum, April 23, 2012
"Wisdom in the Age of Digital Information: A Virtual Speech," 2005
"Sustainability in the Age of Development," Cornell Silicon Valley Conference, May 14, 2005
"Life in the Age of the Genome," Inaugural Address, New York City, October 15, 2003