Abundance or the Earth Is Full ?  

TED has a contrasting pair of talks up - Paul Gilding explaining the doomer vision of the future in The Earth is full vs Peter Diamandis' more optimistic vision, Abundance is our future.

Have we used up all our resources? Have we filled up all the livable space on Earth? Paul Gilding suggests we have, and the possibility of devastating consequences, in a talk that's equal parts terrifying and, oddly, hopeful.

Paul Gilding is an independent writer, activist and adviser on a sustainable economy. Click through to watch the onstage debate that followed this talk.

Onstage at TED2012, Peter Diamandis makes a case for optimism -- that we'll invent, innovate and create ways to solve the challenges that loom over us. "I’m not saying we don’t have our set of problems; we surely do. But ultimately, we knock them down.”

Peter Diamandis runs the X Prize Foundation, which offers large cash incentive prizes to inventors who can solve grand challenges like space flight, low-cost mobile medical diagnostics and oil spill cleanup. He is the chair of Singularity University, which teaches executives and grad students about exponentially growing technologies.