In a sport known for rampant jealousy, there was an outpouring of goodwill for all three men after the Derby.

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Secrecy is jettisoned in favour of self-publicity on Facebook, opening the way for ridicule, jealousy and betrayal.

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"Romantic love and parental love are overlapping systems, " says Parrott, who has studied jealousy and envy for more than 25 years.

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Thus to see studies that lay the ground for flatter incomes because of hardwired human jealousy are, well, dubious on the face of it.

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While other people testifying, such as privacy advocate Justin Brookman of the Center for Democracy and Technology, pointed out that this is a problem for consumer privacy, Weinstein just expressed jealousy.

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Still, jealousy seems an unlikely basis for voting decisions.

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Res Jost bore the brunt of his mentor's jealousy when Wolfgang Pauli (famous for the exclusion principle) suddenly broke off their collaboration and subjected him to public censure.

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Its growth has also created extraordinary windfalls for some, and aroused more than a whiff of jealousy among others.

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But the price he has to pay for this new freedom, which gives rise to persecution and jealousy, is solitude.

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At home, the man on the couch, though filled with admiration for his other, better self, feels a twinge of jealousy, and even, strangely, something like fear.

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