Last year, the journalist Malcolm Gladwell conducted a survey of chief executive officers of Fortune 500 companies for his book Blink. He discovered that while in the US population 14.5 per cent of all men are 6ft (1.83m) or taller, among CEOs of Fortune 500 companies the proportion is 58 per cent. And while 3.9 per cent of American adults are 6ft 2in or taller, almost a third of the CEOs were that tall.