Our bodies evolved to handle sudden, intense bursts of cortisol and adrenaline. When a predator chases you, your endocrine system spikes, solves the problem, and returns to baseline. This "allostatic load" was designed for short durations. Now, however, modern life replaces these sharp spikes with low-grade, constant friction like financial debt, social comparison, or noise pollution.
This shift causes a fundamental mismatch. Instead of periodic surges, we experience a steady, creeping elevation in stress hormones. This chronic state can lead to biological weathering. Over time, the feedback loops that regulate cortisol become less sensitive, meaning the body loses its ability to turn the stress response off. This creates a cycle of systemic inflammation and metabolic dysfunction that affects nearly every organ.
Regarding evolution, we are currently in a massive, unplanned biological experiment. While individual hormonal changes happen within a lifetime, evolutionary shifts require genetic changes across generations. If these environmental stressors exert enough selective pressure—for example, by impacting reproductive success or survival rates—we might eventually see shifts in how our species manages metabolic or stress-response genes. We are currently witnessing the physiological toll of living in a world our biology does not yet recognize.
