Book excerpt: After Oil explores the social, cultural and political changes needed to make possible a full-scale transition from fossil fuels to new forms of energy. Written collectively by participants in the first After Oil School, After Oil explains why the adoption of renewable, ecologically sustainable energy sources is only the first step of energy transition. Energy plays a critical role in determining the shape, form and character of our daily existence, which is why a genuine shift in our energy usage demands a wholesale transformation of the petrocultures in which we live. After Oil provides readers with the resources to make this happen.