“…The apparent desire for more shut-eye, together with oft-repeated assertions that our grandparents slept longer, all too easily leads to the conclusion that we in the west are chronically sleep-deprived. Adding to these concerns are recent claims that inadequate sleep causes obesity and related disorders, such as diabetes.

Plus ca change. Claims of widespread sleep deprivation in western society are nothing new – in 1894, the British Medical Journal ran an editorial warning that the ‘hurry and excitement’ of modern life was leading to an epidemic of insomnia.

Even then it probably wasn’t true. The fact is that most adults get enough sleep, and our collective sleep debt, if it exists at all, has not worsened in recent times. Moreover, claims that sleep deprivation is contributing to obesity and diabetes have been overblown. My assertion is that the vast majority of people sleep perfectly adequately. That’s not to say that sleep deprivation doesn’t exist. But in general we’ve never had it so good.” (New Scientist)