Kick starting the World.

[Joe]

We might not need to fall back to horse and plough as we still have a lot of viable infrastructure in place even after a major shtf.
Faced with a major event and a kill rate of 99% of the population it doesn't need to be game over. Yes infrastructure as we know it will probably fail and it will be very difficult to bring national grids and networks back online but there are hundreds of windfarms, dams, solar etc that can be brought back into service at a local level eg village/small town.
Once you have power then life gets a lot easier, there are electic motors lying around everywhere, eg washing machines, fans etc and these can be pressed into service.
Knowing basic power and engineering skills are a very useful skill in the future if it really hits the fan.