The Kronos Quartet's large-scale program created in collaboration with the Bulletin of the Atomic Scientists and inspired by the Doomsday Clock. The project grew out of a Kronos performance in Chicago for a gathering of Nobel Prize-winning physicists addressing existential threats such as nuclear weapons, climate change, and artificial intelligence. That performance, which combined music with readings from Hiroshima survivors, world leaders, and historical archives, sparked a program exploring the fragility of civilization and honoring the scientists working to safeguard it.