The transition movement began in Totnes in Devon in 2006, co-founded by Rob Hopkins and Naresh Giangrande. Since then communities all around the world have started running local projects in response to the joint threats of climate change and dwindling supplies of energy as well as a recognition that unlimited economic growth cannot continue in the face of the earth’s finite resources.

More information is on the Transition Network website.
See the Ecologist website for an article about the Transition Movement
An article about Rob Hopkins latest book The Power of Just Doing Stuff: How Local Action Can Change the World.