From war to capitalism, sleep deprivation is taking a toll on humans.

When I was a freshman at Columbia University in 1999, the professor of my Literature Humanities course shared some personal information with my class, which was that she slept exactly three hours per night. I forget what prompted the disclosure, though I do recall it was made not to elicit pity but rather as a matter-of-fact explanation of the way things were: sleeping more than three hours a night simply did not allow her sufficient time to simultaneously maintain her professorship and tend to her baby.

This, of course, was before the era of smartphones took the phenomenon of rampant sleep deprivation to another level. But modern life has long been characterised by a lack of proper sleep – an activity that happens to be fundamental to life itself.

I personally cannot count the times I have awakened at one or two o’clock in the morning to work, unable to banish from my brain the capitalist guilt at engaging in necessary restorative rest rather than being, you know, “productive” 24 hours a day.

And yet mine is a privileged variety of semi-self-imposed sleep deprivation; I am not, for example, being denied adequate rest because I have to work three jobs to put food on the table for my family.