This video is a lecture by Thomas Homer Dixon presented at the University of Waterloo as part of that university's big ideas series. His recent research has focused on threats to global security in the 21st century and how societies adapt to complex economic, ecological, and technological change. The video is long but well worth watching - particularly if you are a climate change activist or worried about climate change. Thomas Homer Dixon points out that we are urgently in need of new tools to cope with an increasingly unpredictable events including climate change. He feels that some of those tools are going to emerge from this field of "complexity theory."
And here's a link to the Waterloo Institute for Complexity and Innovation mentioned by Dr. Homer Dixon during his talk. From their home page:
The Waterloo Institute for Complexity and Innovation is a research hub that promotes the rigorous transdisciplinary study of innovation within—and the resilient and beneficial transformation of—the complex adaptive systems essential to human well-being.