“Stonebreakers” chronicles the conflicts around monuments that arose in the United States during the George Floyd protests and the 2020 presidential election. As statues of Columbus, Confederates and Founding Fathers fall from their pedestals, the nation’s triumphalist myths are called into question. By exploring the shifting landscapes of American monumentality, the film interrogates the link between history and political action in a nation that must confront its past now more urgently than ever.