Abstract
Most normative advice to individuals about what they should do to help prevent climate change focuses on reductions in personal emissions. This is consistent with an accountancy model of morality, with perpetrators held responsible for the harms they individually cause. An alternative focus receiving less popular and philosophical attention, but with greater potential to achieve substantial mitigation outcomes, is citizen activism for systemic reforms. Rather than perpetration priority moral concern can be directed to bystanding. To more effectively guide action, reformist ethics need to be informed by psychosociological research on motivation and societal transformation.