Keynes's idea was very simple. Monetary and fiscal policy should have a single goal, jointly pursued, of maintaining a full employment level aggregat… - Robert Skidelsky

History, politics, sociology, psychology and anthropology are suggestive, not conclusive, disciplines: they cannot prove (or more importantly disprove) any hypothesis. Economics should aim to be more like them and less like physics and maths. That is why I was drawn to Keynes: he was a man of many parts. I have heard economists say he was a brilliant thinker, but a bad theorist. They objected to his 'ad hoc' theorizing - inventing bits of theory to explain unusual events, rather than building up his theory from secure micro-foundations. His wife called him 'more than an economist'. I am less than an economist, but perhaps this makes me better able to appreciate his greatness.

Maynard Keynes was born into a certain civilisation at a particular moment of history, and was one of its foremost products. He inherited both its aspirations and its tensions. He grew up in the shadow of its great figures, notably Henry Sidgwick and Alfred Marshall, the teachers and colleagues of his father. His style of thought and way of life both bear Cambridge's unmistakable imprint.

The reason why economics has given such a poor account of the origins of the crisis is that there is something essentially incompatible between the economist's view of individual rationality and systemic collapse. Without adding qualifications which strain their logic, economists cannot readily get from their picture of the the individual maximizing his utilities to booms and slumps and the persistence of depressions.