A sweeping and timely study of aggressive nationalism, its deep historical roots, and its modern-day resurgence. In a compelling exploration of nationalism's darker facets, this book delves into the aggressive, expansionist strain that has fueled conflict and suffering throughout human history. While nationalism is often linked to modernity, the author traces its roots back to humanity's earliest recorded eras, revealing how elements such as racialism, ethnicity, language, religion, and culture have historically ignited aggressive nationalism. Drawing from a sweeping analysis of over 33 European countries, the book examines the common experiences of nations from their tribal beginnings to the current age of superpowers. While acknowledging that some forms of nationalism—like secessionism and irredentism—may serve as legitimate expressions of self-defense, the primary focus remains on the destructive impulse to invade and dominate neighbouring lands. This work is not just a historical study; it serves as a cautionary tale for the present day. With 2024 as its backdrop, the author connects historical patterns to contemporary issues, warning of the resurgence of extreme right-wing ideologies across the globe. This thought-provoking examination urges readers to confront the past's lessons, emphasizing that history is not merely a record of what has been, but a vital lens through which to understand our present and shape a more peaceful future.