Nicholas Wright's book Warhead explores the crucial role of the human brain in warfare, arguing that understanding our neurological drives is key to both the origins and conduct of conflict. Drawing on examples from ancient battles to modern wars, Wright examines how basic instincts like thirst and fear, governed by specific brain regions, have shaped military outcomes. He discusses how emotional control can lead to both heroic and horrific acts, and highlights the importance of higher brain functions such as creativity and strategic thinking in adapting to new forms of warfare. Wright warns that unless democracies adapt quickly, they risk losing future conflicts, especially as technology and human-machine relationships become central to war. Ultimately, he contends that a deeper grasp of neuroscience is essential for navigating the dangers of future global conflicts.