Most wil have frozen to death in the heart of winter. how do you heat a home in 10 degree weather with a wind turbine or a solar panel? dummies....
freezing/overheating to death will be a big part of it. much of our life expectancy of 70+ years is because we have energy.
Energy to run life saving medical equipment, ambulances etc.....
we can easily go back 200 years in advancement very quickly without energy. And the next generation will look for new energy sources in, oddly enough, the original energy sources that got us here today in the first place—fossil fuels!