International aid actors and their role in supporting civil society, particularly non-government organisations (NGOs), in Asia has attracted extensive debate. Some view donors’ New Policy Agenda to have de-politicised and “NGOised” civil society, undermining broader emancipatory movements. Such analyses, however, often take limited account of historical and political factors that are deeply influential. Cambodia and Myanmar offer unique insights into these debates; following decades of international isolation, both countries experienced vast influxes of aid, from the early 1990s and late 2000s respectively. Yet in 2024, civil society activism is eviscerated in Cambodia, while a broad alliance is pursing revolution in Myanmar against the 2021 military coup. Through a comparative analysis, this article examines how aid and civil society interact over an extended time, and what the radically different trajectories mean regarding the dynamics between international aid and civil society actors. The article concludes that although international aid had a distortionary impact, historical and political factors were far more consequential in shaping civil society in both countries, particularly the scale of informal, non-NGO activism, which has ultimately proven far more resilient and transformative.