The term Anthropocene (Age of Human) implies that the reduction of carbon emissions is a matter of changing human behaviour. This risks depoliticising the climate emergency. Everyone is not equally responsible for climate change, and the consequences of climate change are not distributed equally. Climate change is overwhelmingly the result of extractive and exploitative capitalist production. It is thus more useful to understand the climate crisis in terms of the Capitalocene (Age of Capital), with climate justice being a terrain of anti-capitalist struggle. Mainstream responses to climate change have largely neglected the Capitalocene, focusing instead on consumer behaviour. This individualistic approach has been taken up by several ecologically oriented psychological professions, where the emphasis has been on ‘responsible consumer behaviour’ and/or the psychological effects of climate uncertainty. There is, however, a growing critical tradition within the psychological professions that seeks to advance climate justice by taking seriously the capitalist political economy. Indeed, psychological practitioners are equipped with skills that may be useful for activists involved in psychopolitical efforts to consolidate climate justice movements and build political power. We posit three key areas for psychological practitioners working for climate justice movements: solidarity-making, affective mediation, and resource mobilisation.