It could be due to all sorts of things, like lower lead levels, endocrine disruptors like BPA, lower smoking rates, social and cultural affects that view mascul

It could be due to all sorts of things, like lower lead levels, endocrine disruptors like BPA, lower smoking rates, social and cultural affects that view masculine traits negatively, lower personal autonomy, declining quality of life for most lower and lower-middle class men, and many similar possibilities.