A useful approximation of normal T levels in humans can be seen in present day hunter gatherers in Africa. The Hadza tribe was shown to have an average level of 151pmol/l, well below that of what we see in societies such as America. We can, therefore, argue that the reduction of T levels in modern man over the last few years is a shift back towards the norm.
I can think of a hundred bigger crimes ( sopuli.xyz )
Alt Text: post that says dripping testosterone levels in men since 1980s is the biggest crime of the century.