Conversation so far:
What is Charles Krauthammer 's name?
Charles Krauthammer was an American political columnist.
What was Charles Krauthammer's monograph?
Charles Krauthammer's 2004 foreign policy monograph, Democratic Realism: An American Foreign Policy for a Unipolar World, was critical both of the neoconservative Bush doctrine for being too expansive and utopian.
Who was a editor of Charles Krauthammer?
Meg Greenfield, editorial page editor for The Washington Post edited Charles Krauthammer's columns for 15 years.

Question: what is he known for
Self-contained rewrite: What is Charles Krauthammer known for?