The human species is likely to breed toward the weaker, rather than the stronger. This is simply by virtue of the fact, we no longer cull the weak, the lame, the sickly, the mutated, and the very old from our herds.
When genetic defects are allowed to continue on an intergenerational basis, they're more apt to get worse, than they are to get better. The weak beget more weak, and so forth..
Lab rats are bred to be hypersensitive to adverse stimuli. They're not as hardy as you basic sewer rat. And so it goes with humans.
We hold to this bizarre notion that each individual is equal in potential, and it's a cultural failing when that doesn't take place. I call BS. When you breed fat, ugly, and stupid, against fat, ugly, and stupid, you don't get Victoria's secret super models with PHDs in their offspring.
If you ask the state of California, every man made process or compound causes cancer. Does it? Or does that come from electing officials from "Hollywierd"?
Maybe there's something upstream causing these cancers.
Look at the fact that brain tumors are now the number one form of cancer in US teens and adolescents and connect the dots that they are the first generation to grow-up using cell phones and other wireless devices. We might not have time for viable long-term studies on this topic. We're dealing with radiation here. And so far, the radiation is winning. Just saying.
Maybe they should put down their phones once in a while. Waddya think?
FWIW, this is hardly the first generation that has dealt with radiation. During the 50's & 60's, the US conducted something on the order of 170 above ground nuclear tests.. None of that could be an issue though,now could it? The broken reactors at. Chernobyl, and Fukashima Daiichi will be spewing radiation for the next 50,000 years. But they give tours through Chernobyl these days.
Read up on these (Material Safety Data Sheets) workers come into hazardous chemicals in many industries on a daily basis:
https://en.wikipedia.org/wiki/Safety_data_sheet
A few common ones are all the ketones and alcohols, urethanes and their hardeners, polyisocyanates, Lye, a wide range of acids. And lest I forget, a very long list of banned pesticides. IE "DDT", the one which almost wiped out our national symbol.
But then again, none of those would be an issue, since you can't get the little sh!ts off their cell phones.-
And BTW, did you know that the front glass of CRT monitors was leaded since they produced X-ray radiation?
Which is why us old fogey's mommas told us, "don't sit so close to the TV".