Are You Ready for Battle? As a Peace Corps volunteer in rural Nigeria, a much-younger Gordon Dalbey scoffed at an illiterate laborer's account of dark spirits that had invaded his house. The man looked the highly educated American squarely in the eye. "There are no small snakes," he declared. Even as the smallest poisonous snake can easily kill the largest and strongest man, to discount dark spiritual forces is not only arrogant,...