According to wilk and cliggett, the development of neoclassical economic theory was a key turning point in the history of economics because it

 It still celebrated the market as the main source of increased economic welfare but it replaced the classical view of economic value as an objective property of produced commodities, to be struggled over by the different classes, with a focus on the subjective calculations of individuals seeking to maximize their own utility. This resulted into the divergent theoretical positions

Italy had political stability, wealth, and trade.