Before revision: The essence of this principle, in brief, is Contemporary thought 20th-century German historians promoting some aspects of historism are Ulrich Muhlack, Thomas Nipperdey and Jörn Rüsen.
After revision: :The essence of this principle, in brief, is Contemporary thought 20th-century German historians promoting some aspects of historism are Ulrich Muhlack, Thomas Nipperdey and Jörn Rüsen.