Conversation so far:
What did John Galbraith do postwar?
In 1946, John Galbraith took a leave of absence from his magazine work for a senior position in the State Department as director of the Office of Economic Security Policy.
Did John Galbraith write any books during this time?
His books on economic topics were bestsellers from the 1950s through the 2000s, during which time John Galbraith fulfilled the role of public intellectual.

Question: What magazine did he work for?
Self-contained rewrite: What magazine did John Galbraith work for?