Robert Skidelsky

The Keynesian economist Nicholas Kaldor called Milton Friedman one of the two most evil men of the 20th century. (Friedman was in distinguished company.) The ‘scourge’ he inflicted on the world was monetarism, a product of what Kaldor called Friedman’s Big Lie – of which more later. Moral judgments aside, how does Friedman rank in the world of 20th-century economists? By common consent, he stands with Friedrich Hayek and John Maynard Keynes at the apex of his profession. All wrestled with the defining problem of their age: the radical economic and political instability of the 1920s and 1930s. Their responses reflected their national situations.

Despite being awarded a Nobel in economics in 1974, Friedrich Hayek was a great thinker rather than a great economist. He called himself a ‘muddler’. His own attempt to build an economic theory floundered. His major contribution was to emphasise the limitations  of economic knowledge, and thus the inevitable frustration of efforts to build economic utopias. His theorising was abstract, but his purpose was practical: to make the case for a liberal economic order which would be proof against the political and economic wickedness and madness through which he lived: the two world wars, the Great Depression and the rise and fall of fascism and communism. Hayek’s was a slow-burning flame.

The French economist, statistician and polymath Thomas Piketty sprang to fame in 2013 with a daunting tome, Capital in the Twenty- First Century. In it he documented a ‘fundamental force of divergence’ in the capitalist system, which he represented by the equation r>g — the tendency for returns to capital to grow faster than national income, and therefore for wealth to concentrate in fewer and fewer hands. This tendency was reversed between 1914 and 1980 by the impact of two world wars, the Great Depression, social democracy and the trade unions, but it has since reasserted itself, restoring levels of inequality last seen 100 years ago.