All epoch-defining events are the result of conjunctures - the correlation of normally unconnected happenings which jolts humanity out of its existin… - Robert Skidelsky

Keynes was an applied economist who turned to inventing theory because the theory he had inherited could not properly explain what was happening.

I could never take seriously the standard view that historians should take ideas as give, and confine themselves to their effects; or even worse, the Marxist-cum-Freudian view that ideas have no independent effects, but are themselves the effects of economic or psychological causes. If one accepts that ideas shape events, then a historian has to be able to describe the ideas or doctrines relevant to his topic as accurately as can a theologian, a philosopher, or an economist. If that requires a specialised training, so be it. Any account of Keynes's influence that failed to engage with his 'theology' would be seriously incomplete as history.

Having said this, it is easy to see that he might have been deluding himself. He envisaged a modern capitalist economy governed by a Platonic ideal, and gentlemanly codes of behaviour. But once the capitalist genie is let out of the bottle it cannot be pressed into the service of a pre-modern ethics of the good life and pre-modern codes of behaviour. The good life in the classical sense presupposes that human desire has some ultimate end, or telos, whereas modern economic theory and life presuppose that it is insatiable. As regards behaviour, he took for granted a class-based system of values which economic progress was undermining. These were contradictions which Keynes never fully faced.