Sun Tzu was a Chinese general, military strategist, writer, and philosopher who lived in the Eastern Zhou period of ancient China. Sun Tzu is traditionally credited as the author of The Art of War, a widely influential work of military strategy that has affected both Western and East Asian philosophy and military thinking. Sun Tzu's work has been praised and employed throughout East Asian warfare since its composition. During the twentieth century, The Art of War grew in popularity and saw practical use in Western society as well. It continues to influence many competitive endeavors in East Asia and Western World including culture, politics, business, and sports, as well as modern warfare.