Undermining an opponent’s will without firing a shot is an ancient strategy with continued appeal. Societal resilience is key to effective defence. In the past, imminent threats and clear enemies have helped unite societies in times of crisis. But today, social media’s information silos and echo chambers have fragmented people into their own micro worlds. Against this backdrop, how do we make sure that people in democracies can find common ground and unite to meet the myriad crises we face?