Sun Wu, style name Changqing, better known as Sun Tzu or Sunzi, was an ancient Chinese military general, strategist and philosopher who is believed to have authored 'The Art of War', an influential ancient Chinese book on military strategy. Sun Tzu has had a significant impact on Chinese and Asian history and culture, both as an author of the Art of War and through legend. During the 19th and 20th centuries, Sun Tzu's Art of War grew in popularity and saw practical use in Western society, and his work has continued to influence both Asian and Western culture and politics.