Why We Think About the Future
Human beings are defined by a unique mental capacity: the ability to think about the future. While other animals may act as if they are planning—such as a squirrel burying nuts for winter—these behaviors are typically hardwired biological responses to environmental triggers. The squirrel does not consciously contemplate its future hunger; it simply follows a program. In contrast, humans engage in conscious prospection, looking forward in time to consider "later." This ability to imagine "what isn't" is arguably the brain's greatest achievement, allowing people to experience events before they actually happen.
This mental time travel is made possible by the frontal lobe, the most recent addition to the human brain. During a rapid evolutionary growth spurt, the human brain more than doubled in mass, with the frontal lobe receiving a disproportionate share of that expansion. For a long time, its function was a mystery. In 1848, a railroad worker named Phineas Gage survived an accident where an iron rod pierced his frontal lobe. Surprisingly, he retained his intelligence and basic faculties, leading early doctors to believe the area was non-essential. However, later research revealed that while people with frontal lobe damage can function in the "permanent present," they lose the ability to plan. They cannot imagine what they will be doing tomorrow or feel the anxiety that comes from anticipating future problems.
The human brain is constantly "nexting," a process of making immediate, nonconscious predictions about what is about to happen. When someone reads a sentence, their brain predicts the next word; when those expectations are violated, the person experiences surprise. While many animals "next" to navigate their immediate environment, only humans engage in the kind of far-reaching prospection that involves imagining themselves in distant scenarios. This capacity is so central to the human experience that people spend roughly twelve percent of their waking thoughts contemplating things that have not yet occurred.
The brain is obsessed with the future for several reasons. First, imagining it can be a source of immediate pleasure. People daydream about success or delay a reward, like a fancy dinner, just to enjoy the "juice" of anticipation. This tendency toward positive visualization often leads to unrealistic optimism, where individuals believe they are more likely than average to experience good fortune. Conversely, people also imagine dark futures to "fearcast." By anticipating a negative event, the mind can reduce its eventual impact or motivate itself to take preventive action.
The most fundamental reason humans look forward, however, is the desire for control. Humans are born with a biological need to be effective agents in their environment, evident in toddlers who find joy in simply making a stack of blocks fall. Research shows that maintaining a sense of control is vital for mental and physical health; for instance, elderly residents in nursing homes who were given control over small aspects of their lives, like caring for a plant, lived longer and were healthier than those who were not. People value this feeling so much that they often succumb to an "illusion of control," behaving as if they can influence random events like the roll of dice. Ultimately, humans steer their lives toward specific futures because they believe they know what will make them happy. However, this "prospectiscope" is often flawed, subject to systematic errors that cause the destinations people work so hard to reach to fail to provide the satisfaction they expected.
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