The transition from the classical to the neoclassical school of economics was marked by a fundamental shift in how value was perceived. Classical economists, like Adam Smith, centered their theories on the labor theory of value, which held that the value of a good is determined by the amount of labor required to produce it. Neoclassical economists, appearing in the late nineteenth century, rejected this in favor of marginalism. They argued that value is subjective and determined by the utility of the next unit of a good consumed. This shift allowed for a more dynamic understanding of prices, as it accounted for changes in consumer preferences and the scarcity of resources. While the classical school provided a solid foundation for understanding production, it struggled to explain why goods with high labor costs sometimes sold for very little, or why non-produced goods like land could have immense value. The neoclassical synthesis resolved these discrepancies by focusing on the interaction of supply and demand at the margin. Critics of the neoclassical approach argue that it oversimplifies human behavior by assuming that individuals always act as rational, utility-maximizing agents. However, the author contends that the neoclassical framework remains indispensable for its ability to model complex market interactions with a precision that the classical model could not achieve. The precision of neoclassical tools provides a clarity that remains central to modern policy analysis.