“SURVIVING THE CENTURY’ The inaugural Carl Sagan Memorial Lecture Cornell University, 8 May 2017 It’s a great honour to give this Carl Sagan lecture. The ideas he stood for need proclaiming louder than ever today. We need an optimistic vision of life’s destiny --- in this world, and perhaps far beyond it. We need to think globally, we need to think rationally, we need to think long-term. Carl’s influence was immense, through his science and – most of all, through his eloquence and global outreach. In this talk I’ll try to address some themes that would have engaged him.. We‘ve been familiar with this image [Earthrise] for nearly 50 years –it’s iconic for environmentalists. .