Why humans are afraid of the dark: An evolutionary biologist explains the ancient survival instinct we can’t seem to forget
Why do humans fear the dark? How can the science of evolutionary biology explain this primitive instinct? Fear of the dark, an instinctual fear related to the human ability to survive in the natural world, is one that exists firmly in modern psychology. According to evolutionary biology, fear of the dark is an adaptation that developed in order to cope with potential dangers and uncertainties associated with the darkness. The purpose of this paper is to explore the evolutionary background of fear, biological processes related to brain reactions to darkness, as well as psychological mechanisms underlying darkness phobia. By examining these factors, we can better understand how ancient survival instincts continue to shape human behaviour and emotional responses today.
Why darkness triggers fear: An evolutionary survival instinct explained
In terms of evolution, fear is not a defect but rather an adaptive strategy. Humans have evolved in habitats where the risk factors increase during the night. This makes it necessary for humans to be careful due to limited visibility in the dark, which means they cannot see any danger approaching.According to the study entitled “Human Emotional Evaluation of Ancestral and Modern Threats: Fear, Disgust, and Anger,” most current fears arise because of “defense mechanisms evolved through natural selection to keep us safe from harm.” During his analysis, he observes that such defense mechanisms usually persist long after the dangers disappear from our environment.The research established that humans continue to exhibit increased sensitivity to threatening situations, particularly when visibility is poor. As the saying goes, it is best “to err on the side of caution” because there is always a possibility of danger.
How the brain responds to darkness
However, the reaction is not the same during darkness since, in this case, the brain responds differently. According to Experiencing Complete Darkness on Brains, which is a research paper on fear, “the brain is better at detecting patterns of threat than confirming safety.”As such, the lack of visual sensory stimulation causes the brain to fill gaps and often come up with the worst outcomes possible. In addition, research has indicated that darkness causes people to be highly attuned to sounds.Accordingly, the ability to perceive sounds is greatly increased when there is a lack of visual stimulation, resulting in an increase in anxiety.
Fear of the dark in modern humans
Even in fairly safe surroundings, many individuals suffer from discomfort, and sometimes fear, in the darkness. According to psychologists, this is due to a mismatch between an instinctive, survival-oriented response of our prehistoric ancestors, which is no longer adapted to current circumstances.According to the aforementioned research, the fear of the dark among adults can be caused by general anxiety and learned behavior, yet it still stems from evolutionary preparedness. We come into the world pre-equipped to fear situations that historically have been risky, including darkness, solitude, and novel surroundings.This phobia may also stem from cultural influence. Darkness is often portrayed as evil or dangerous in various tales and media.
Can we overcome this ancient fear
While the terror of the dark comes naturally, it can also be overcome. An appreciation for its evolutionary origin frequently reduces terror.Once a person recognises that their fear is merely a defensive response to a threat that does not exist, then challenging the feeling can become much easier.There are several methods based on cognitive behavioural therapy that have been demonstrated to work. The Journal of Anxiety Disorders shows that controlled exposure to frightening circumstances lowers anxiety reactions. Other recommendations include establishing a strict bedtime routine and limiting the number of stimuli before going to bed.The fear of the dark is not unfounded, it is innate. Evolutionary biology, brain functions, and cultural influences all contribute to the existence of fear of the dark. While modern people have mostly stopped facing any danger at night, their brain is still programmed to respond the same way it did tens of thousands of years ago.An understanding of fear does not cure it, but it does offer insight. It allows one to understand that the fear originated from a need for survival, and it gives control over it.
