Paul Gilding has spent 35 years trying to change the world, doing everything he can think off. He’s served in the Australian military, chased nuclear armed aircraft carriers in small inflatable boats, plugged up industrial waste discharge pipes, been global CEO of Greenpeace, taught at Cambridge University, owned and run two ground-breaking sustainability focused companies and been a close confidant and advisor to the CEOs of some the world’s largest companies. More about Paul on his website.

You really do have to wonder whether a few years from now we’ll look back at the first decade of the 21st century — when food prices spiked, energy prices soared, world population surged, tornados plowed through cities, floods and droughts set records, populations were displaced and governments were threatened by the confluence of it all — and ask ourselves: What were we thinking? How did we not panic when the evidence was so obvious that we’d crossed some growth/climate/natural resource/population redlines all at once? Read Thomas L. Freidman's op-ed.