Rather than taking AI as a central focus, this paper treats it as diagnostic of deeper contradictions. AI intensifies extractivism while being unable to deliver on its promises, and its rampant scaling of energy and resource demands heralds a form of ‘total mobilisation’. This paper proposes decomputing as a programme for pushing back against such technocratic nihilism. Decomputing adopts a degrowth framework and advocates for reclaiming agency through deautomatisation and people’s councils, in order to develop convivial alternatives that centre an ethics of care. It is a philosophical and tactical response to the wider crisis of care induced by the collapse of existing systems. Decomputing proposes a prefigurative praxis for those experiencing ruptures in the infrastructures of everyday life, while minimising the opening for an authoritarian turn or war economy. Rather than capitulating to an increasingly fascistic world order, decomputing advocates a shift in the idea of order itself, one that means challenging the idea that ever more advanced tech is synonymous with progress.  The paper argues that reclaiming critical infrastructures can be decoupled from the collapse of the general technopolitical regime, and makes a plausibility argument informed by destituent power and largely forgotten British cybernetics. Where the Luddite call was to ‘put down all machinery hurtful to the Commonality’, the goal of decomputing is the infrastructuring of the common good.