Zhuangzi was an influential Chinese philosopher who lived around the 4th century BCE during the Warring States Period, a period corresponding to the philosophical summit of Chinese thought - the Hundred Schools of Thought. He is credited with writing-in part or in whole-a work known by his name, the Zhuangzi. His name Zhuangzi (English 'Master Zhuang', with Zi being an honorific) is sometimes spelled Zhuang Tze, Zhuang Zhou, Chuang Tsu, Chuang Tzu, Chouang-Dsi, Chuang Tse, or Chuangtze.