"Keynes saw himself as overturning ‘‘classical’’ economics. He was less revolutionary than he thought. Large chunks of Marshallianism – particularly to do with the importance of time (short and long periods), the technique of partial equilibrium analysis, and the cash balances version of the quantity theory of money – were central to his economics and distanced it from the timeless simultaneous-equation general equilibrium theory of Menger and Walras which Hayek regarded as the supreme achievement of the marginalist revolution."