The author of "The Art of War," an influential text on military strategy, is Sun Tzu, an ancient Chinese general and philosopher. Written during the 6th century BCE, this work provides insights into warfare, strategy, and tactical maneuvers based on principles of adaptability, deception, and the understanding of both one's own forces and the enemy. The principles laid out in "The Art of War" have transcended military applications, impacting business, leadership, and competitive strategies across various fields throughout history.