For a lot of the people I interact with on a daily basis, it is some kind of black art. It's sad, but it's true. The same with hunting, fishing, whatever.

The thing I would miss would be glasses. Because I would be blind (pretty much) and not able to hunt/fish/keep from being hunted. I'd be a total loss without corrective lenses, no matter what other skills I had - I can't see 2 feet in front of my face without them.

There are three ways that our car-centric world could fall :

Cataclysm - all the sh*t hits the fan, and everyone panics, and it becomes anarchy.
Slow Takeover - A newer technology takes hold allowing transportation of goods and persons across the world without involving cars. Eventually cars are museum pieces.
Fast Takeover - A company goes against the other corporations and introduces something that is so revolutionary that it becomes the hottest thing to have since cars first arrived. Everyone and their dog MUST have one to keep up with the Jonses. Extremely unlikely.

I don't know - I kind of would like to civilization fail. Probably not enough to whipe everyone out, but a nice slap in the face would probably be a good thing at this stage in our evoloution as a species/planet. Because at this point, humans aren't just another species spread about the planet. We have taken ourselves to the point where we are a measurable force just like the weather. We need to get our heads out of our wallets and realize that there is a bigger goal that we should all be working towards together...

Am I ranting yet? Or is this still conversation?