Psychologist John Rottenberg argues the popular "chemical imbalance" theory is a metaphor, not a measurable biological reality like high cholesterol. Unlike cholesterol, there's no test to show a patient their "number" or that treatment is changing it, making the metaphor an oversimplification.
Historically, fever was wrongly treated as a disease to be suppressed. We now see it as a healthy immune response. This reframes depression not as a flaw, but as a potentially adaptive, though painful, response from our evolutionary drive to survive and flourish.
From an evolutionary perspective, low mood isn't a malfunction. It is an adaptive signal that forces an organism to pause when facing an uncertain or unpromising situation. It compels a reconsideration of the current strategy to ensure long-term survival and flourishing.
Social media feeds project ecstatic, curated lives, creating an unrealistic benchmark for happiness. This leads individuals to perceive a large discrepancy between their own emotional state and a perceived norm, making them question "what is wrong with me?" and deepening their low mood.
The modern emphasis on pursuing happiness as an end in itself is often counterproductive. True happiness is more often a byproduct of engaging in meaningful activities like work, relationships, or helping others. Directly chasing the feeling of "happiness" sets unrealistic expectations and can increase unhappiness.
Contrary to the idea that depression is purely destructive, it can serve as an "engine of meaning." The experience can force a re-evaluation of one's life path, build profound empathy, and lead to a greater appreciation for "normality" after recovery, ultimately resulting in positive transformation.
While other animals experience low moods, humans' unique capacity for language and self-narrative amplifies this state. We create stories of failure and worthlessness ("I should never have been born"), turning a simple adaptive state into a much deeper, more terrifying form of suffering.
Those experiencing depression may have a more accurate view of the world, a phenomenon called "depressive realism." While a good mood often relies on positive illusions that ignore hard truths like mortality, a low mood forces a person to confront these difficult realities.