At the start of the twentieth century, agriculture was a very significant sector of the Australian economy, both in Gross Domestic Product (GDP) and export terms. By the middle of that century, manufacturing had become dominant. By the end of the century, both had been overshadowed by the services sector, which since the 1970s has progressively expanded to the point where it is claimed to now account for almost 70% of national economic output, four out of every five jobs, and one fifth of exports. These statistics suggest that sectors such as farming and mining no longer matter in the national economy, and yet as the recent drought and the current minerals boom demonstrate, the national economic impact of shocks in these sectors can be much...