The Italian Fascist outlook towards capitalism changed after 1929, with the onset of the Great Depression which dealt a heavy blow to the Italian economy. Prices fell, production slowed, and unemployment more than tripled in the first four years of the Depression. In response, the Fascist government abandoned economic liberalism and turned to state intervention in the economy. Mussolini developed a theory which held that capitalism had degenerated over time, and that the capitalism of his era was facing a crisis because it had departed too far from its original roots. According to Mussolini, the original form was heroic capitalism or dynamic capitalism (1830–1870), which gave way to static capitalism (1870–1914), which then transformed into decadent capitalism or "supercapitalism", starting in 1914. Mussolini denounced this supercapitalism as a failure due to its alleged decadence, support for unlimited consumerism and intention to create the "standardization of humankind". He claimed that supercapitalism had resulted in the collapse of the capitalist system in the Great Depression, but that the industrial developments of earlier types of capitalism were valuable and that private property should be supported as long as it was productive. Fascists also argued that, without intervention, supercapitalism "would ultimately decay and open the way for a Marxist revolution as labour-capital relations broke down". They presented their new economic program as a way to avoid this result.