Peak Oil, post-industrial world.
http://www.youtube.com/watch?v=DMQd5nGEkr4
It's simple, after the world reaches peak oil production, demand will outstrip supply. Things will change.
If you google "PEAK OIL" you'll get thousands of hits, a lot of them total loonies. It's the scientists and geologists that support this theory that make you think there might be something in it.
Lucky for us a SV650 is pretty cheap to run, but not when fuel is a fiver a litre.
The survivalists are pleased...
http://www.youtube.com/watch?v=QovBLFZhQME