quality:correction
Breadth of knowledge

A further sense in which the term is commonly applied, especially by British politicians, is in talking about an individual's depth and breadth of knowledge (or lack thereof), of matters outside politics, specifically of academic, artistic, cultural, literary and scientific pursuits. For instance, one could say, "X has a vast hinterland", or "Y has no hinterland". The spread of this usage is usually credited to Denis Healey (British Defence Secretary 1964–1970, Chancellor of the Exchequer 1974–1979) and his wife Edna Healey, initially in the context of the lack of hinterland—i.e., interests outside of politics—of former Prime Minister Margaret Thatcher.