Neoclassical economics, which remains the prevailing orthodoxy, emerged in the late nineteenth century in the context of rising working-class opposition to capitalism. The theory’s appeal in certain circles as an apologetic for the status quo probably assisted its rise to prominence, which is not to imply that this was necessarily a motivation of the neoclassical economists themselves. The rise of any economic theory requires a receptive audience. Classical political economy had not provided defenders of the system with a comparable apologetic. Not only had it informed Marx’s analysis of capitalism but there were socialist movements drawing on interpretations of Ricardo’s labor theory of value. Class was central to the understanding of capitalism in both classical political economy and Marx, and no attempt had been made to conceal the class antagonisms characterizing the system.