When Conrad Crane retired from active duty to become a research professor, he never expected to become a modern Cassandra, fated to tell truth to power without being heeded. After the world transformed on 9/11, he warned the Army that it was not prepared to execute stability operations, counterinsurgency, and the eventual reconstruction of Iraq. Crane's work attracted the attention of Generals David Petraeus and James Mattis, and he soon found himself...