Answer:
Group polarization has always been a thing, whether it be by class or political lean it is the way it is, no country is without strife, eventually tensions amount to the point the government can't contain it and has to get involved. I believe an American civil war is a possibility but unlikely, and probably not in our lifetime.
Explanation:
Transportation.
Carbon dioxide.
Quicker easier travel.
Explanation:
In may 2017 another nearby tunnel of waste partially caved,in sending the Hanford site into emergency lockdown.The partial collapse of tunnel 1 led to the federal investigation and decision to seal up both tunnels with grout.
The economy was not doing well, soldiers were coming home with horrible PTSD and after-shock, the great depression was going on, etc. :)
