Mortimer J. Adler (1902-2001) is well-known as a scholar, educator, and editor.In addition to writing, he is well-known for being the editor-in-chief of "The German Classics of the Western World" and serving as the editorial director of the fifteenth edition of "Encyclopedia Britannica" in 1974. Charles Van Doren (1926- ) He was a professor at Columbia University in the United States.Later, he resigned for some reason and worked with Adler.On the one hand, he assisted Adler in editing the "Encyclopedia Britannica", on the other hand, he substantially added and rewritten the content of the first edition of the book in 1940.Therefore, the new edition of this book in 1970 is jointly signed by two people.