Church bells rang out, echoing across Colombia. People held signs in the streets and posted exuberant messages online: the last day of the war. That day last month, when the ceasefire was signed, could have been the last day of the war, but a piece of paper is no guarantee. Realising the ceasefire’s promise – lasting peace – lies not in the final agreement but in grassroots activism. Big questions need answers. How will we…