Not so long ago, people North and South had little reason to believe that wealth from oil, gas, and coal brought anything but great prosperity. But the presumption of net benefits from fossil fuels is eroding as widening circles of people rich and poor experience the downside. A positive transition to a post-fossil fuel era cannot wait for global agreement, a swap-in of renewables, a miracle technology, a carbon market, or lifestyle change. This book shows that it is now possible to take the first step toward the post-fossil fuel era, by resisting the slow violence of extreme extraction and combustion, exiting the industry, and imagining a good life after fossil fuels. It shows how an environmental politics of transition might occur, arguing for going to the source rather than managing byproducts, for delegitimizing fossil fuels rather than accommodating them, for engaging a politics of deliberately choosing a post-fossil fuel world. Six case studies reveal how individuals, groups, communities, and an entire country have taken first steps out of the fossil fuel era, with experiments that range from leaving oil under the Amazon to ending mountaintop removal in Appalachia.