Two years into President Maithripala Sirisena’s term, Sri Lanka’s fragile hopes for lasting peace and cooperation across party and ethnic lines are imperilled. Despite significant achievements in the coalition government’s first nine months, progress on most of its reform agenda has slowed to a crawl or been reversed. As social tensions rise and the coalition slowly fractures, it is unclear whether it can push its signature new constitution through parliament and to a national referendum. Neither the president nor prime minister has made a serious attempt to win support for a more inclusive polity or to reform the national security state to tackle the institutionalised impunity that has fed ethnic unrest and harmed all communities. To protect democratic gains, enable lasting reforms and reduce risks of social and political conflict, the “unity government” should put aside short-term party and individual political calculations and return to a politics of reform and openness.