The expert community is full of such examples. The most famous, at least if measured by impact on the global public, is the MIT professor Noam Chomsky, a figure revered by millions of readers around the world. Chomsky, by some counts, is the most widely cited living American intellectual, having written a stack of books on politics and foreign policy. His post at MIT, however, was as a professor of linguistics. Chomsky is regarded as a pioneer, even a giant, in his own field, but he is no more an expert in foreign policy than, say, the late George Kennan was on the origins of human language.
...more

