Sedentary lifestyles, soy-based diets (phytoestrogens), plastics (BPA, a known endocrine disruptor), chronic sleep deprivation, and social media-induced status anxiety have dropped average male testosterone levels by over 50% in the last 40 years. A 60-year-old man today has the testosterone of an 85-year-old man in 1960.
For a long time, the narrative was simple: Men evolved to hunt. Hunting required aggression, strength, and risk-taking. Therefore, evolution favored high testosterone. Secret Testosterone Nexus Of Evolution
"" appears to be the title of a 2025 book by Andrew Johnson that explores how modern environmental factors affect male hormonal health. Hunting required aggression, strength, and risk-taking
Instead, it gets a passive-aggressive email and a traffic jam. Instead, it gets a passive-aggressive email and a
While often simplified as the "aggression hormone," testosterone is actually a sophisticated metabolic architect. It sits at the intersection of social hierarchy, physical adaptation, and reproductive strategy, acting as the invisible hand that guided our ancestors from the trees to the stars.
In evolutionary biology, the "Handicap Principle" suggests that high testosterone features (like a peacock’s feathers or a lion’s mane) are "honest signals." Because testosterone can suppress the immune system, only the healthiest males can afford the "cost" of high levels. This allows females to identify mates with the strongest immune genes. Dimorphism and Niche Adaptation:
It is the reason Gutenberg stayed up late to invent the printing press. It is the reason Neil Armstrong agreed to sit on top of a rocket. It is the reason someone first looked at a wolf and thought, "I'm not running from that; I'm taming it."