I wonder how much of the declining testosterone epidemic is due to hormone pollution, and how much is other causes. Because there's a bunch of lifestyle choices that lower testosterone: bad food, zero high intensity exercise, a sedentary lifestyle (even if you do work out), obesity, smoking and alcohol, stress... When we talk about low T, it's probably not the guy who walks or bikes often, does some kind of sport or physical activity, is in shape, getting his nutrients filled in who doesn't drink and sleeps consistently well. We also know that you become what you think... you can raise your test with your mind, but you can also lower it. A guy walking around with good posture, who tells himself he's the man, will have higher T than a guy with desk-itis and lacking self-esteem.
I'm not one of the guys who think life 70 years ago was the high watermark of human existence, and I think having that idea is either ignorant or plain stupid. For example the chemicals in the environment we complain about today were released in that time, because of deregulation. But we know, for example, that obesity was non-existent then relative to today. So these factors are worth analyzing too.