sentences:  Apart from his scholarship, Schroeder has been a regular contributor to the magazine "The American Conservative", writing strong critiques of the Bush administration's foreign policy (especially regarding the Iraq War) for its destabilizing, counterproductive effects.The internationalist, realist perspective of his critiques fits well with his favorable appraisals of the 19th-century Concert-of-Europe approach to international relations that Schroeder has offered as a model in his scholarship.Perry Anderson has called him "arguably the greatest living American historian" and said that his "The Transformation of European Politics, 1763-1848" "revolutionised one of the most disgraced of all fields in the discipline, ... diplomatic history."