He was the Edward R. Murrow fellow at the Council on Foreign Relations in 1973-'74 and senior associate at the Carnegie Endowment for International Peace in 1979-'83, where he published Rebel Europe: Living with a Changing Continent, called by Los Angeles Times reviewer Charles Champlin "the most important book I have read in years."
From 1973 to 1974, he served as an Edward R. Murrow fellow at the Council on Foreign Relations.  He later held a senior associate position at the Carnegie Endowment for International Peace from 1979 to 1983. His book "Rebel Europe: Living with a Changing Continent" was highly acclaimed by Charles Champlin of the Los Angeles Times.