Ever since, partisan propensities have been rising, for a solid 20 years or so.

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The young antihero is arrested, and the Home Office or Ministry of the Interior introduces a form of aversion therapy guaranteed to eliminate criminal propensities forever.

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Data is also what runs in the global financial systems, measures our consumption propensities and behaviors, provides indications of whether bankers should buy or sell, and either produces profits or crisis.

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And what that survey seems to be showing is that in the UK, at present, our marginal propensities to save or spend are the wrong way around (according to standard Keynesian theory that is).

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It can only help restore buying propensities everywhere.

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Indeed, it might be argued that a better understanding of humanity can help direct efforts to counteract those propensities viewed as detrimental or undesirable, thus ensuring people are less, rather than more, in thrall to their biology.

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Since the old, who have shorter time horizons, have larger propensities to consume than do the young, this transfer has fueled a huge increase in personal consumption, reducing our national saving rate (saving as a share of national income) from 10 to 15% in the 1950s and 60s to a negative 1.5% last year.

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