Herman Kahn was the only nuclear strategist in America who might have made a living as a standup comedian. In telling his story, Ghamari-Tabrizi captures an era that is still very much with us--a time whose innocence, gruesome nuclear humor, and outrageous but deadly serious visions of annihilation have their echoes in the "known unknowns and unknown unknowns" that guide policymakers in our own embattled world.