"Dead Wake: The Last Crossing of the Lusitania" by Erik Larson explores the tragic sinking of the Lusitania during World War I. The book intricately details the background of the ship, its journey, and the geopolitical tensions of the time. Larson intertwines personal stories of those aboard the Lusitania with the broader historical context, painting a vivid picture of the events leading up to the disaster. The book emphasizes the impact of the sinking on public opinion and the war, illustrating how a single event can change the course of history.

The quote, "constantly keep in mind that whatever has happened," encapsulates the theme of reflection on the past and its repercussions. Larson urges readers to recognize the significance of historical events and their everlasting effects on society and individuals. The Lusitania's sinking serves as a stark reminder of the fragility of life in wartime and the profound consequences of political decisions. Understanding this history is vital for interpreting current events and the human condition.