The book is collected into ""Excellent Works Series by Law Learners"", which records the fine law works created by contemporary young and mid-aged scholars, and it is a crucial reference book to theoretical study and practical work in China. It is a monograph by Dr. Liang Qing. Causative potency is a trivial but crucial matter in tort liability law. At present, the field research in this topic is not deep enough yet. The author studied penetratingly on it from theory and practical issues. The book is a dedication to legislation of tort law both theoretically and practically .