This paper, in honour of John King, addresses the question raised by him in his A History of Post-Keynesian since 1936, reflected in the title. Initial surveys of post-Keynesian economics defined it in term of the Keynesian, Kaleckian and Sraffian strands. However, subsequently, it has become...

The Traverse refers to the movement of the economy outside equilibrium. It requires a consideration of how an economy may achieve equilibrium, and how it may navigate towards a new one if conditions change. Analysis of these themes, from the classical economists onwards, leads to the conclusion...