""Morale: First Line of Defense?"" is a book written by Edward L. Bernays in 1941. The book is a comprehensive analysis of the concept of morale and its importance in times of war. Bernays argues that morale is the key factor that determines the success or failure of any military campaign. He emphasizes the need for leaders to understand the psychological aspects of war, and to use propaganda and other techniques to maintain high levels of morale...