This paper shows that Keynes’s involuntary unemployment derived from Walras’s voluntary unemployment by means of changing of the characteristic of the aggregate supply curve (function) of labour. On the one hand, when the original aggregate supply function is a strongly increasing function,...

This paper shows that the post-Walras general equilibrium theory is irrelevant to real contemporary economic life. The main achievement of modern General Equilibrium Theory is the proof of equilibrium’s existence. It might be that the proof of the equilibrium existence is a mathematical...