Complex sentence: The journal was established in 1941 as "The Far Eastern Quarterly", changing to its current title in September 1956, when Donald Shively was editor, which he remained until 1959.
Split into simpler sentences: The journal was established in 1941 as "The Far Eastern Quarterly", obtaining its current title in September 1956. During this transition period Donald Shively was the editor-in-chief, which he remained until 1959.