In this new book, world-renowned cybersecurity expert John Arquilla looks unflinchingly at the challenges posed by cyberwarfare – which he argues have been neither met nor mastered. He offers fresh solutions for protecting against enemies that are often anonymous, unpredictable, and capable of projecting force and influence vastly disproportionate to their size, strength, or wealth. The changes called for require radical rethinking of military and security affairs, diplomacy, and even the routines of our daily lives.