original_query: What is the Hallstein Doctrine and who was it named after?
query: What is the Hallstein Doctrine and who was it named after?
answer: The Hallstein Doctrine was a key principle in West Germany's foreign policy from 1955 to 1970.  It stated that West Germany would not establish diplomatic relations with any state that recognized East Germany. It's named after Walter Hallstein, then state secretary at the German Foreign Office, though Wilhelm Grewe played a significant role in its creation.