Late in 2015, nearly two hundred countries signed the Paris Agreement acknowledging their individual and collective duty to protect the earth's climate—and willfully refused to perform that duty. In response to this institutional failure and to growing climate destruction, we are witnessing the birth of a global nonviolent constitutional insurgency. Against Doom: A Climate Insurgency Manual tells how to put strategy into action—and how it can succeed. It is a handbook for halting global warming and restoring our climate—a how-to for climate insurgents.