There are also a number of other interpretations of the consensus which many historians have discussed such as Labour Historian Ben Pimlott. He says this idea is a "mirage, an illusion which rapidly fades the closer one gets to it." Pimlott sees much disputation and little harmony. He notes the term "Butskellism" meant harmony of economic policy between the parties, but it was in practice a term of abuse, not celebration. In 2002, Scott Kelly claimed that there was in fact a sustained argument over the use of physical controls, monetary policy and direct taxation. Political scientists Dennis Kavanagh and Peter Morris defend the concept, arguing that clear, major continuities existed regarding policies toward the economy, full employment, trade unions, and welfare programs. There was agreement as well on the major issues of foreign policy. British historian David Kynaston considers the period of post-war consensus a unique and distinct period in the history of twentieth century Britain and has undertaken to map the development of British society between 1945–79 in his ongoing series of books titled "Tales of a New Jerusalem". So far, three volumes have been published, covering the years 1945–63.