"In brief the Austrian theory of the business cycle was never refuted or even rejected at the London School, but simply forgotten despite the efforts of Hayek and subsequently Lachmann (as noted below) to improve the theory (Hayek, Profits, Interest, and investment [1939; reprint; New York: Augustus M. Kelley, 1969]). With the Keynesian revolution, macroentities had replaced the action of individuals. Subjectivism and individual causation had been superseded by functional relations among objectified aggregates, which had few if any real world referents in the actions of economizing individuals. A whole tradition transplanted to British soil vanished. When Lachmann had arrived in London during the early 1930s, everybody was a Hayekian, but by the beginning of World War II the only consistent and thoroughgoing Hayekians left were Lachmann and Hayek himself."