Cognitive psychologists sometimes talk in terms of two distinct types of consciousness: spotlight consciousness, which illuminates a single focal point of attention, making it very good for reasoning, and lantern consciousness, in which attention is less focused yet illuminates a broader field of attention. Young children tend to exhibit lantern consciousness; so do many people on psychedelics. This more diffuse form of attention lends itself to mind wandering, free association, and the making of novel connections – all of which can nourish creativity. By comparison, caffeine’s big contribution to human progress has been to intensify spotlight consciousness – the focused, linear, abstract and efficient cognitive processing more closely associated with mental work than play. This, more than anything else, is what made caffeine the perfect drug not only for the age of reason and the Enlightenment, but for the rise of capitalism, too.
Alas, there is no free lunch. It turns out that caffeine only appears to give us energy. Caffeine works by blocking the action of adenosine, a molecule that gradually accumulates in the brain over the course of the day, preparing the body to rest. Caffeine molecules interfere with this process, keeping adenosine from doing its job – and keeping us feeling alert. But adenosine levels continue to rise, so that when the caffeine is eventually metabolised, the adenosine floods the body’s receptors and tiredness returns. So the energy that caffeine gives us is borrowed, in effect, and eventually the debt must be paid back.
Caffeine is not the sole cause of our sleep crisis; screens, alcohol (which is as hard on REM sleep as caffeine is on deep sleep), pharmaceuticals, work schedules, noise and light pollution, and anxiety can all play a role in undermining both the duration and quality of our sleep. But here’s what’s uniquely insidious about caffeine: the drug is not only a leading cause of our sleep deprivation; it is also the principal tool we rely on to remedy the problem. Most of the caffeine consumed today is being used to compensate for the lousy sleep that caffeine causes – which means that caffeine is helping to hide from our awareness the very problem that caffeine creates.
Michael Pollan
Interesting piece on the merits and downsides of caffeine consumption on individual health and society overall. I am far from a big drinker of coffee, with no more than two cups a day, but I still occasionally felt its adverse effects on my sleeping patterns – I made a habit to drink coffee in the early afternoon, so sometimes I have trouble falling asleep late at night. Attributing the Enlightenment and capitalist society to the regular intake of caffeine strikes me as grossly exaggerated though. As most good things in life, coffee is best consumed and enjoyed in moderation.
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