Martin EP Seligman & John Tierney
We are misnamed. We call ourselves Homo sapiens, the ‘wise man’, but that’s more of a boast than a description. What makes us wise? What sets us apart from other animals? Various answers have been proposed—language, tools, cooperation, culture, tasting bad to predators—but none is unique to humans. What best distinguishes our species is an ability that scientists are just beginning to appreciate: we contemplate the future. Our singular foresight created civilisation and sustains society. It usually lifts our spirits, but it’s also the source of most depression and anxiety, whether we’re evaluating our own lives or worrying about the nation. Other animals have springtime rituals for educating the young, but only we subject them to “commencement” speeches grandly informing them that today is the first day of the rest of their lives.
A more apt name for our species would be Homo prospectus because we thrive by considering our prospects. The power of prospection is what makes us wise. Looking into the future, consciously and unconsciously, is a central function of our large brain, as psychologists and neuroscientists have discovered—rather belatedly because for the past century most researchers have assumed that we’re prisoners of the past and the present.
Behaviourists thought of animal learning as the ingraining of habit by repetition. Psychoanalysts believed that treating patients was a matter of unearthing and confronting the past. Even when cognitive psychology emerged, it focused on the past and present—on memory and perception.
But it is increasingly clear that the mind is mainly drawn to the future, not driven by the past. Behaviour, memory and perception can’t be understood without appreciating the central role of prospection. We learn not by storing static records, but by continually retouching memories and imagining future possibilities. Our brain sees the world not by processing every pixel in a scene, but by focusing on the unexpected.
Our emotions are less reactions to the present than guides to future behaviour. Therapists are exploring new ways to treat depression now that they see it as primarily not because of past traumas and present stresses, but because of skewed visions of what lies ahead.
Prospection enables us to become wise not just from our own experiences, but also by learning from others. We are social animals like no others, living and working in very large groups of strangers because we have jointly constructed the future. Human culture—our language, our division of labour, our knowledge, our laws and technology—is possible only because we can anticipate what fellow humans will do in the distant future. Some of our unconscious powers of prospection are shared by animals, but hardly any other creatures are capable of thinking more than a few minutes ahead.
If you’re a chimp, you spend much of the day searching for your next meal. If you’re a human, you can usually rely on the foresight of your supermarket’s manager, or you can make a restaurant reservation for Saturday evening thanks to a remarkably complicated feat of collaborative prospection.
The central role of prospection has emerged in recent studies of both conscious and unconscious mental processes, like one in Chicago that pinged nearly 500 adults during the day to record their immediate thoughts and moods. If traditional psychological theory had been correct, these people would have spent a lot of time ruminating. But they actually thought about the future three times more often than the past, and even those few thoughts about a past event typically involved consideration of its future implications.
When making plans, they reported higher levels of happiness and lower levels of stress than at other times, presumably because planning turns a chaotic mass of concerns into an organised sequence. While most people tend to be optimistic, those suffering from depression and anxiety have a bleak view of the future—and that in fact seems to be the chief cause of their problems, not their past traumas nor their view of the present. While traumas do have a lasting impact, most people actually emerge stronger afterward. Others continue struggling because they over-predict failure and rejection. Studies have shown depressed people are distinguished from the norm by their tendency to imagine fewer positive scenarios while overestimating future risks.
They withdraw socially and become paralysed by exaggerated self-doubt. Researchers have begun successfully testing therapies designed to break this pattern by training sufferers to envision positive outcomes and to see future risks more realistically.
Most prospection occurs at the unconscious level as the brain sifts information to generate predictions. Perception is manageable because the brain generates its own scene, so that the world remains stable even though your eyes move three times a second. This frees the perceptual system to heed features it didn’t predict, which is why you’re not aware of a ticking clock unless it stops. It’s also why you don’t laugh when you tickle yourself: you already know what’s coming next.
Behaviourists used to explain learning as the ingraining of habits by repetition and reinforcement, but their theory couldn’t explain why animals were more interested in unfamiliar experiences than familiar ones. It turned out that even the behaviourists’ rats, far from being creatures of habit, paid special attention to unexpected novelties because that was how they learned to avoid punishment and win rewards.
The brain’s long-term memory has often been compared to an archive, but that’s not its primary purpose. Instead of faithfully recording the past, it keeps rewriting history. Recalling an event in a new context can lead to new information being inserted in the memory.
The fluidity of memory may seem like a defect, especially to a jury, but it serves a larger purpose. It’s a feature, not a bug, because the point of memory is to improve our ability to face the present and the future. To exploit the past, we metabolise it by extracting and recombining relevant information to fit novel situations. This link between memory and prospection has emerged in research showing that people with damage to the brain’s medial temporal lobe lose memories of past experiences as well as the ability to construct rich and detailed simulations of the future.
Perhaps the most remarkable evidence comes from recent brain imaging research. When recalling a past event, the hippocampus must combine three distinct pieces of information—what happened, when it happened and where it happened—that are each stored in a different part of the brain. Researchers have found that the same circuitry is activated when people imagine a novel scene. Once again, the hippocampus combines three kinds of records (what, when and where), but this time it scrambles the information to create something new.
Even when you’re relaxing, your brain is continually recombining information to imagine the future, a process that researchers were surprised to discover when they scanned the brains of people doing specific tasks like mental arithmetic. Whenever there was a break in the task, there were sudden shifts to activity in the brain’s “default” circuit, which is used to imagine the future or retouch the past.
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This discovery explains what happens when your mind wanders during a task: it’s simulating future possibilities. That’s how you can respond so quickly to unexpected developments. What may feel like a primitive intuition, a gut feeling, is made possible by those previous simulations.
If Homo prospectus takes the really long view, does he become morbid? That was a longstanding assumption in psychologists’ “terror management theory”, which held that humans avoid thinking about the future because they fear death. The theory was explored in hundreds of experiments assigning people to think about their own deaths. One common response was to become more assertive about one’s cultural values, like becoming more patriotic.
But there’s precious little evidence that people actually spend much time outside the lab thinking about their deaths or managing their terror of mortality. It’s certainly not what psychologists found in the study tracking Chicagoans’ daily thoughts. Less than 1% of their thoughts involved death, and even those were typically about other people’s deaths.
Homo prospectus is too pragmatic to obsess on death for the same reason that he doesn’t dwell on the past: there’s nothing he can do about it. He became Homo sapiens by learning to see and shape his future, and he is wise enough to keep looking straight ahead.