 After World War II, Paul Samuelson used the term "neoclassical synthesis" to refer to the integration of Keynesian economics with neoclassical economics.The idea was that the government and the central bank would maintain rough full employment, so that neoclassical notions—centered on the axiom of the universality of scarcity—would apply.John Hicks' IS/LM model was central to the neoclassical synthesis.