Endocrine disruptors, diet, plastics, reduced exercise (exercise absolutely causes more testosterone to build muscle in response to stress), less violent and ph

Endocrine disruptors, diet, plastics, reduced exercise (exercise absolutely causes more testosterone to build muscle in response to stress), less violent and physical environment/society, other pollutants. Heck, sitting in chairs puts your testes closer to your body, which reduces sperm count. There are tons of reasons that probably add up. The scary part might be the pollutants though. Women also change their level of testosterone preference based on the stress level of environment. Civilization is by definition a less stressful environment regardless of inflation/unemployment rate.