This chapter covers the period from 1945 to 1953. During this time, Kahn returned to Cambridge after the war, resuming his academic activities while maintaining contact with the government until at least 1947–1948. Throughout this period, Kahn remained committed to defending key principles: the primacy of full employment in economic policy, the necessity of combining an accommodative monetary policy with fiscal restraint on private consumption and direct controls on the allocation of strategic resources, to promote investment and growth. Through these endeavours, Kahn’s intellectual profile as a Cambridge Keynesian economist became increasingly apparent, particularly in comparison to British economists with different perspectives.