This paper attempts to investigate the main factors behind Argentina's relative economic decline by comparing its evolution with that of Australia and Canada. For this purpose a ‘reduced index of economic freedom’ has been constructed in order to capture and summarise the principal macroeconomic trends in Argentina compared with the other regions of recent settlement during the period between 1875 and 2000. The results, obtained using cointegration and causality techniques, show how the macroeconomic policies that were implemented are able to explain the relative evolution of Argentina's economy, in terms of GDP per capita, over the long term. The results revise some of the interpretations prevalent in Argentine historiography.