Are we running out of resources? That’s been a hotly debated question since the publication of Paul Ehrlich’s book The Population Bomb in 1968. The Stanford University biologist warned that population growth would result in the exhaustion of resources and a global catastrophe. University of Maryland economist and Cato Institute’s Senior Fellow Julian Simon, in contrast, argued that humans would innovate their way out of resource shortages. He believed that people were the “ultimate resource” that would make other resources more plentiful. On Earth Day 2019, David M. Simon will recall the humanism and optimism of his late father. Gale Pooley and Marian L. Tupy will present the updated findings from their recent paper “The Simon Abundance Index: A New Way to Measure Availability of Resources” and launch The Simon Project, a new www​.human​progress​.org initiative. Finally, George Gilder will discuss the link between human ingenuity, innovation, and prosperity.