The article discusses how Karl Marx's theory of price is crucial for understanding economic crises. The author argues that Marx's theory of price is essential for grasping his overall explanation of capitalism. By focusing on this neglected aspect of Marx's work, the author aims to provide an interpretation of Marx's theory of price that aligns with the logic of his analysis in "Capital". This approach sheds light on the relationship between price, money, capital accumulation, and economic crises in the capitalist system.