Circular Economy (CE) is predominately approached through a technicaland engineering paradigm, which aims to radically reduce waste by redesigning re-source flows. This often ignores the CE’s social dimension. While the entrepreneur-ship and business model literatures do recognise the importance of people in CEtransitions, this chapter goes a step further by understanding CE through an activ-ism lens. Our argument builds on social movement perspectives of societal transi-tions, showing that change is often enacted by grassroots communities in everydaysettings. We provide three examples of what we term circular society activism, illus-trating our argument. We contribute to the CE literature by conceptualising circularsociety as a form of prefigurative action that can be enacted by communities in thehere and now.