Transition Network helps communities respond to climate change and shrinking supplies of cheap energy (peak oil). This process, which they call Transition, aims to create stronger, happier communities. Transition Network's role is to inspire, encourage, connect, support and train communities as they self-organise around the transition model, creating initiatives that rebuild resilience, reduce CO2 emissions.  
A Transition town, or more generally a transition initiative, is a grassroots community project that seeks to build resilience in response to peak oil, climate destruction, and economic instability by creating local groups that uphold the values of the transition network. The first initiative to use the name was Transition Town Totnes, founded in 2006. The socioeconomic movement is an example of fiscal localism. Since then, many Transition groups have started around the United Kingdom (UK) and, in recent years, the world. By September 2013, there were 1130 initiatives registered (462 Official, 654 Muller) in 43 countries.